MPC-1 User and Programming Manual
Contents
1. SCPI COMMAND Relay Energized Relay Status Optical Scrambling Status OPEN No Closed Enabled CLOSE Yes Open Disabled Table 6 PS 700 Scrambling Control with Form B relays FiberControl Lightwave Polarization Solutions 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web 27 The following are provided as equivalent examples to disable optical scrambling ROUTe CLOSe 1 7 ROUTe CLOSe 1 2 3 4 5 6 7 The following is provided as an example to enable optical scrambling ROUTe OPEN ALL Refer to Appendix A 1 of the ICS Electronics Instruction Manual for more information about SCPI commands and on how to concatenate multiple commands on the same line i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 28 Appendix A Key Operations Quick Reference To Power up the PS 700 Attach provided power cord by mating C13 plug to the PS 700 s IEC 320 receptacle then insert plug end into line power and push the rocker switch to the 1 position Green LED on the front panel will light LSTN RX GPIB status LED flashes once RDY GPIB status LED lights Scrambler is now ready for operation To Power down the PS 700 Press the rocker switch to the 0 position2. USER MANUAL and PROGRAMMING GUIDE FiberControl Polarization Independent Polarization State Scrambler PS 700 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email fi www fibercontrol com we Please Note With the understanding and the desire of improving the clarity and readability as well as to reduce omissions and correct errors the information within this manual is subject to change without notice FiberControl shall not be liable for any errors herein or for any accompanying or subsequent damage in connection with the furnishing operation or use of this material With regard to this material FiberControl makes no warranty regarding the suitability and fitness for any specific function purpose or use Base FiberControl part number PS 700 Printed 16 May 2002 Copyright FiberControl 2002 All rights reserved 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web FiberControl s goal is to produce the best valued Lightwave Polarization Solutions to meet a wide range of applications in the field of optical measurements We greatly value input from our customers with ideas to improve and enhance our existing products as well as expand our product line Please feel free to of
3. FC is not liable for consequential damages The warranty mentioned before does not cover errors and defects being the result of improper treatment software or interface not supplied by us modifications misuse or operation outside the defined ambient stated by us or unauthorized maintenance All further claims will not be consented to and will not be acknowledged FC does not explicitly warrant the usability or the economical use for any application FC reserves the right to change this instruction manual or the technical data of the described unit at any time Removal of any of the top and or bottom enclosure cover s screws even in only an effort to gain entry inside the enclosure nullifies the PS 700 s warranty and incurs the risk of physical harm i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web Contact Information United States of America FiberControl P O Box 198 Holmdel New Jersey 07733 phone 1 732 332 1860 toll free 1 888 91 FIBER fax 1 732 332 1861 email info fibercontrol com Web http www fibercontrol com Call to obtain the ship to address Outside the U S A Several distributors throughout the world also represent FiberControl Please refer to our web site or call our US based offices to ask for the nearest distributor 1 888 91 FIBER toll free F i be
4. under proper tension around each tube in a cascade of separate piezoelectric tubes PZTs with random amounts of fixed birefringence separating each tube where each tube is then separately excited on a time varying basis Geometrical physical displacement of each tube resulting from its excitation imparts a time varying birefringence to a portion of the fiber wound around that particular tube This time varying birefringence perturbs an initial SOP of the light from its original pseudo stationary position on a Poincar sphere i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web Specifically an optical signal upon entering the scrambler passes through a fiber that is wound around each successive tube grouped into two groups of three PZTs Each of these sets of tubes is operated in a similar fashion and is excited by a two separate types of specially modulated radio frequency RF electrical drive signal These two sets of signals when applied to each group of the PZTs cause the tubes to exhibit a specific behavior vis a vis its geometric physical displacement i e the tubes slightly expand and contract physically in response to the signals Theses time varying displacements which effectively stress the fiber wound around the tubes induces time varying birefringence in the fiber This time varying birefr
5. 700 INPUT OUTPUT ROY TAUTS LSTNRX SROSRM ERR FiberControl lt Industries san Sa Qi T TH Figure 2 Front on view detailing dimensions of the rack mount capability of the PS 700 7 i 12 000 12 785 o a i i L 16 740 A 1 18 932 Figure 3 Top down view of the partially assembled rack mounting brackets i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 2 Specifications and General Information Table 1 Optical specifications Optical Specifications Insertion Loss typical lt 1 00 dB Coverage of Poincar Sphere 90 to 99 near pseudo random Degree of Polarization lt 5 Polarization Dependent Loss lt 0 002 dB Wavelength Operating Range 1300 nm to 1600 nm or 980 nm region Connector Types FC SC or Bare Fiber Return Loss Connector polish gt 50 dB 0 gt 60 dB 8 fusion splice Max Signal Power 30 dBm Scrambling Rate f 4 MHz Residual AM Modulation lt 0 1 1550 nm with connectors 1550 nm FC PC connectors A U N Measured at the 10dB point from near uniform electrical rf spectral distribution FiberControl Lightwave Polarization Solutions Below SRS limit SBS limit determined by the spectral broadening of user s source 1 888 91 FIBER toll fre
6. Caution High Voltage symbol This symbol shown as a lightning bolt inside an equilateral triangle warns of the presence of life threatening voltages inside of the enclosure if entered by the user Caution High Voltage symbol On the inside of the PS 700 the locations of these life threatening voltages are not specifically marked Therefore significant and meaningful personal physical risk is present for anyone not completely familiar with the PS 700 s design The level of risk also holds true for the measurement and test equipment of the user 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web viii The Caution symbol shown below as the exclamation point inside a equilateral triangle is also on the back of the PS 700 denoting the requirement of extreme caution if the enclosure is entered into or if the exterior is cleaned with liquids Caution symbol Again assistance is available from FiberControl please refer to Assistance and Maintenance and Warranty and Restrictions To insure the personal physical safety of the operator it is recommended that the top and or bottom covers of the PS 700 should never be removed at any time The PS 700 is only to be cleaned with a lightly damp cloth regardless of the precautions and care undertaken by the user doing the c
7. e The once lighted green LED will dim slowly over a few seconds until dark e The GPIB LEDs will dim slowly over a few seconds until dark To change the GPIB address Address range is 0 to 30 do not choose 0 7 21 Method 1 configuring from other controllers e Refer to ICS Elect owner s manual 2 7 e Default internal GPIB address is set to 4 Method 2 activating and using external dipswitch e Refer to ICS Elect owner s manual 2 10 3 e Slide the dipswitch to desired address setting 1 888 91 FIBER toll free F i be rC ontro 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web
8. the PS 700 Press the rocker switch to the 0 position e The once lighted green LED will dim slowly over a few seconds until dark e The GPIB LEDs will dim slowly over a few seconds until dark i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 21 4 2 2 Optical Interface The highlighted oval in Figure 15 shows the location of the input and output optical connections for the PS 700 The unit is shipped with dust covers on the FC UPC bulkhead adapters to keep dust and other contaminants away from the optical interface Polarization State Srambler FiberControl Industries Figure 15 Depiction of PS 700 s front panel with highlighted oval showing the locations of the optical input output connectors Standard industry practice must be followed to insure that the connectors remain clean Be sure to follow proper cleaning procedure for the connectors prior to inserting them into the bulkhead feedthrough e g using an industry standard cleaning tool or compressed air to remove dust particles 4 2 3 Remote Control and its Connections Located on the rear panel is the GPIB connector and address switch Following the GPIB standards the GPIB cable can be attached as desired directly to a controlling computer or in a festooned configuration i 1 888 91 FIBER toll free F i be rControl 732
9. 0 4 11 1995 Supplementary Information Low Voltage Directive Including amendments to above LV Directive Standard including amendments 1 2 3 4 and 11 EMC Directive Standard Electromagnetic Compatibility emissions Standard Radio disturb information technology equipment Standard Harmonic current emissions Standard Voltage fluctuation and flicker emissions Standard Electromagnetic Compatibility immunity Standard Electrostatic discharge immunity Standard Radiated r f e m field immunity Standard Electrical fast transient burst immunity Standard Surge immunity Standard Conducted immunity Standard Voltage dips and interruptions immunity Since this product conforms to the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC the PS 700 carries the CE marking Declaration of Conformity originally conducted by F Squared Laboratories Damascus MD 20872 Report 2227 01 Issue Date 12 21 2000 Subsequently switcher replaced Power One linear power supply Holmdel New Jersey USA 20 February 2002 FiberControl Lightwave Polarization Solutions J D Evankow Jr MTS 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web 3 General Concepts and Applications 3 1 Introduction This manual describes the operation and specifications of FiberControl s Polarization In
10. 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 22 FiberControl 1 732 332 1860 fibercontrol com www trol MADE IN USA TVS XXXXXXXX PATENT PENDING Figure 16 Rear panel depiction with an oval highlighting the location of the GPIB interface The usable address range is limited to the industry standard range of 0 and 30 It is not recommended that addresses 0 7 or 21 be used for the PS 700 since industry standards customarily use these for GPIB bus controllers The PS 700 provides two different methods to set the GPIB address configuring from other controllers and via the external dipswitch The GPIB address set to 4 The default method has the external dipswitch disabled and therefore requires the GPIB address in the non volatile flash memory to be set using another controller Please note as mentioned earlier when the GPIB address is changed from its default setting a different LED or set of LEDs in the highlighted portion of Figure 14 will light momentarily when the PS 700 is turned on To change the GPIB address to 20 e CALL ieOutput 4 SYST COM GPIB ADDR 20 msDelay 70 CALL ieOutput 20 SYST COM GPIB ADDR Rdg String 10 CALL ieEnter 20 Rdg PRINT Rdg Alternatively setting the GPIB address via the external dipswitch is a four step process Since the switch inputs are low true signals with pullup res
11. 4 Physical characteristics of the PS 700 PHYSICAL Overall H x W x D OverallH x WxD_ Enclosure Enclosure Metric English Height Width Dimensions 9 2x48 1x32 5cm 3 x 18 9 x 12 8 2U 83 7HP Weight 34 6 N 3 53 kg 7 79 Ibs Note e Overall heights H of desktop units include the presence of skid resistant rubber pads located on the bottom panel 0 32 cm 1 8 thick e Overall widths W of rack mount units include mounting hardware e Enclosure height and width are related to the enclosure only does not include the rack mounting hardware or skid resistant rubber pads e 1U 4 44 cm 1 3 4 e 1HP 0 51 cm 0 2 FiberControl Lightwave Polarization Solutions 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web Declaration of Conformity Declaration de Conformit Konformitatserklarung FiberControl P O Box 198 Holmdel New Jersey 07733 U S A declares under its own responsibility that the product Polarization Independent Polarization State Scrambler PS 700 conforms to the following product Directives and Standards Safety 73 23 EEC 1973 93 68 EEC 1993 EN 60950 1992 89 336 EEC EN 50081 1 1992 EN 55022 1998 EN 61000 3 2 1995 EN 61000 3 3 1995 EN 50082 1 1997 EN 61000 4 2 1995 EN 61000 4 3 1995 EN 61000 4 4 1995 EN 61000 4 5 1995 EN 61000 4 6 1995 EN 6100
12. Appendix A Key Operations Quick Reference i 1 888 91 FIBER toll free FiberControl a Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web xi Table of Contents 1 Setup and Preparation sicccsicctarossionssavericudVoisesscweciaieazaveneernisenecest 1 TI Fabletop Unit saen EE EEE 1 1 2 Rack Mounting the Tabletop Unit n ea 2 2 Specifications and General Information cccceeceeeeeeeeeeeeees 4 3 General Concepts and Applications cccceseeeeeeeeeeeeeeeeeeeeees 8 3 1 IMtirodUCtO Nessa a E EER 8 32 PAD DIIC AMON a creere E E E 9 3 3 Representations of the rapidly scrambled SOPS ccccceceeeeeeeeeeeeeees 9 3 4 Design Background sec ecedetectscde acon cntntenndentecetoeatnondseataceibest bones 11 3 5 Principle of Operation vesscsccecsotrcadsuracmaacmainscnsdeaapianiecdasdeastnadeasoanias 12 4 Front and Rear Panel DeSCriptiOn ceceeeceeeeeeeeeeeeeeeeeeees 17 PM E Ea e AE E 17 4 2 Front Panel Indicators Rear Panel Interface 1 18 4 2 1 General Usage Powering up and Powering down cee 18 4 2 2 Optical Interface asic casndortncsndelennieleddiadannocn ieniandiamar uesasnianrce 21 4 2 3 Remote Control and its Connections eee eeeeeeeeeeeeeeeeeeeeeeeee 21 4 3 Rear Panel Marking and Fusing Information ccccceeeeeeeeeeeeeeeeees 24 5 Remote Operation The PS 700 Command Set c0 25 51 General
13. PIB IEEE 488 2 Next to the GPIB connector is a dipswitch that can be used to set the address Also on the rear panel is the on off rocker switch exhaust for the cooling fan and warning labels fusing information FiberControl 1 732 332 1860 ce GPIB www fibercontrol com RS 232 RS 422 OUTPUT JADE IN USA STV XXXXXXXX PATENT PENDING A Je OPTICAL TE be J mA M Figure 11 Rear view of PS 700 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 18 Be certain that the vents on the top of the unit and the back fan are free of obstruction so that cooling air can properly circulate through the unit Please note Sections of text surrounded by boxes with 10 gray level similar to this example periodically listed throughout the manual are intended as concise summaries to aid the user These summaries are grouped together in Appendix A 4 2 Front Panel Indicators Rear Panel Interface 4 2 1 General Usage Powering up and Powering down To power up the PS 700 press the large dark colored button in the upper left rear panel marked above the power cord On the surface of the switch are two small labels to designate the operation of the powering i e rocking the switch to the 1 corresponding to powered on and the rocking the button to the 0 position co
14. bercontrol com email www fibercontrol com web undesirable optical scrambling was developed Optical polarization scrambling effectively changes the SOP of light over time Techniques were developed that ostensibly produced polarization dependent optical polarization scrambling utilizing a single mode optical fiber that was wrapped around a single cylindrical piezoelectric tube PZT where the tube was then activated with an R F electrical signal In practice effective optical scrambling could only be achieved if the drive frequency and drive voltage supplied to the PZT were precisely adjusted and controlled A major drawback of this conventional technique is that an input SOP had to be maintained at a particular SOP in order to achieve effective random scrambling therefore this technique was actually polarization dependent Adjusting the electrical drive voltage and frequency was problematic but having to control and maintain the input SOP was even more so and thus highly undesirable Hence this technique proved unworkable in practice Consequently the PS 700 polarization scrambler was developed to provide optical scrambling that does not require the input SOP to be at any particular value 3 5 Principle of Operation Advantageously the PS 700 overcomes the deficiencies associated with the conventional technique of providing optical polarization scrambling Polarization independence is achieved by wrapping a single optical fiber
15. cle The fuse can be accessed by gently prying out the fuse holder with a small slot head screwdriver a small rectangular void to the right of the power receptacle provides an aid for leverage during prying A slow blow x 1 is placed under the plastic retaining strip of the fuse holder Only fuses from a reputable manufacturer with the proper voltage and current rating must be used Because the PS 700 was designed with an internal auto switching power supply a wide range of line voltages is acceptable i e exceeding the nominal 100 VAC 50 Hz to 240 VAC 60 Hz range This provides the opportunity for proper operation of the PS 700 even if the line voltage dips slightly during seasonal high demand periods The rear panel also contains the warning labels see Hazard and Warning Labels Symbols for additional information Read this section carefully A fan with integrated fan guard and serial number is also located on the rear panel 1 888 91 FIBER toll free F i be rC ontro 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 25 5 Remote Operation The PS 700 Command Set 5 1 General An ICS Electronics Instruction Manual for Model 4864 GPIB control interface along with a CDROM is provided with FC s PS 700 This CDROM contains a software program that can be installed onto standalone IBM PC computers thus providing a platform
16. common to all IEEE 488 2 compatible devices The ICS Electronics Model 4864 within the PS 700 responds to these commands and to additional optional common commands defined in the IEEE 488 2 Standard Within the ICS i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 26 Instruction Manual Table 3 1 lists the respond to these commands and describes their effect and its status reporting structure The PS 700 s GPIB accepts SCPI commands and command extensions to operate relays that determine the status of optical polarization scrambling The 4864 s SCPI commands conform to SCPI Standard 1994 0 and provide an industry standard self documenting form of code that makes it easy for the programmer to maintain Table 2 shows the SCPI command tree Keyword Parameter Form Notes amp Single Letter Commands ROUTe Relay Control CLOSe channel list Cn OPEN channel list On ALL A Table 5 SCPI command tree of PS 700 with ICS Electronics Model 4864 Note The format for a SCPI channel list is 1 2 n or 1 n The relays are listed in the SCPI channel list format The channel list format is space 1 2 3 n or space 1 n Examples are 1 2 or 1 4 The space between the and the first number is required In the examples 1 2 n means a list of items up to n characters long
17. cyclical movement about the Poincar sphere Their behavior has been referred to as operating in a deterministic manner where their single resonant behavior is a byproduct of the predictable rate that the polarization state moves around the Poincar Sphere By contrast the PS 700 has an almost white noise quality indicating a near pseudo random movement in Stokes space and is a direct result of multiple independently driven PZT tubes and unique AM FM modulation technique refer to patent at http www uspto gov for additional information Please note to minimize the danger to the end user the loaded internal drive voltage to each of the PZT tubes was designed to operate well below 20 Vp p and open circuit drive voltages are less than 40 Vp p i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 16 17 4 Front and Rear Panel Description 4 1 General The PS 700 Polarization Controller provides high performance polarization scrambling together with an easy to use interface The front and rear panel interfaces enable the user to perform all operations Polarization State Srambler INPUT OUTPUT L optica FiberControl Industries Figure 10 Front view of PS 700 The rear panel provides the easy access for connecting line power via IEC 320 and control cabling i e G
18. d primarily for the tabletop it can also be rack mounted This section discusses details about the mounting brackets The rack mounting hardware for the PS 700 consists of two brackets attached on each side near the front panel and is provided standard from the factory Each rack mounting bracket is attached by a pair of 10 32 by 3 8 stainless steel flat head screws These two mounting brackets can be easily removed using a 2 Phillips head screwdriver Below in Figure 1 is shown the top down view of the unattached rack mounting bracket and hardware i e 10 flat head screws 10 FLAT HEAD SCREWS 2 RACK MOUNT BRACKET 4 FRONT PANEL Figure 1 One of the two left hand side rack mounting brackets for the PS 700 1 888 91 FIBER toll free F i be rC ontro 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web As shown in Figure 1 these two rack mounting brackets are attached towards the front panel on the left and right hand sides with 10 flat head screws Figure 2 and Figure 3 show the front on and top down views respectively of the PS 700 with the rack mounting brackets unattached and partially attached respectively The PS 700 arrives from the factory with rack mounting brackets already attached on delivery the PS 700 is ready for mounting to an industry standard 19 equipment rack rails poe Se else Polarization State Srambler PS
19. dependent Polarization State Scrambler PS 700 The PS 700 rapidly alters the state of polarization SOP of light within single mode optical fibers in a pseudo random manner It provides a simple user friendly front panel interface for direct interaction as well as remote computer control via GPIB 488 2 Moderately rapid short term variations of output SOPs is inherent in this technique The PS 700 is capable of altering the SOP over a wide range of wavelengths while minimally impacting the other optical parameters e Ultra low insertion loss e Ultra low reflection and e Ultra low PDL Based on techniques originally developed by Herv C Lef vre at Stanford University the PS 700 utilizes time varying stress induced birefringence to alter the SOP of the polarized components of light With one continuous length of optical fiber secured onto six independent piezo electric tubes each receiving an r f drive voltage via a novel patented method a time varying birefringence is imparted into the fiber Multiple sections of the fiber receive spatially distributed sets of stress These provide polarization independent operation In other words the scrambler s capability to provide a fast and near uniform distribution of output Stokes vectors does not depend of the input SOP Alternative SOPs appearing at the input of the PS 700 result only in altering the scrambling path and continues to provide near uniform but different coverag
20. dress range is 0 to 30 do not choose 0 7 21 Method 1 configuring from other controllers e Refer to ICS Elect owner s manual 2 7 e Default internal GPIB address is set to 4 Method 2 activating and using external dipswitch e Refer to ICS Elect owner s manual 2 10 3 e Slide the dipswitch to desired address setting FiberControl Lightwave Polarization Solutions 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web 24 4 3 Rear Panel Marking and Fusing Information The rear panel of the PS 700 provides the easy access for connecting line power via the IEC 320 receptacle in the power entry module Also present on the overlay is a table showing the specifications and information on the fusing and line voltage Below in Figure 17 is shown a likeness of the table on the label that appears directly underneath the power entry module on the back panel of the PS 700 MODEL NUMBER PS 700 LINE VOLTAGE 47 63 Hz FUSE 85 264 VAC 1A Figure 17 Line voltage and fusing information located on the rear panel of the PS 700 The line fuse is housed in right hand side of the power entry module see oval highlighting this area in Figure 12 It is important to note that all power must be disconnected from the PS 700 prior to accessing the fuse holder or fuse the plug must be removed from the PS 700 s IEC 320 recepta
21. e 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web Table 2 Instrumentation control INSTRUMENTATION CONTROL Parallel Control Interface GPIB IEEE 488 2 1 port Response Time lt 5 msec Software Compatibility w GUI interface Labview 6 0 or any other GPIB capable development environment System Controller Embedded EBX w microcontroller ICS Elect Model 4864 GPIB Controller Processor National Instruments uPD7210 Make Break Contacts Six independent high current relays Host Operating Systems Windows 95 Windows 98 Win NT 4 0 Win2000 Pro Windows XP Front Panel Control Interface Display LED Indicators RDY TALK LSTN SRQ ERR None Yes Yes Yes Yes Yes to refer to ICS Elect Owner s manual t following GPIB standard IEEE 488 2 FiberControl Lightwave Polarization Solutions 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web Table 3 Line power and temperature LINE POWER TEMPERATURE Electrical Input Voltage 85 VAC 264 VAC auto switching Line Frequency 47 63 Hz Power Dissipation nominal 45 W Fusing Requirements 1 Amp Power Receptacle IEC 320 Power Supply Efficiency nominal 82 Operating Temperature 10 C to 35 C Table
22. e of Stokes 3 space e g the Poincar sphere 1 USPTO 4 389 090 USPTO 20020037127 FiberControl 732 332 1860 telephone elepnone l er on ro 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 3 2 Applications Many applications exist for the PS 700 a few examples are PDL system and component measurements Moderate High speed polarization scrambler As a component in a PMD emulator or compensator Semiconductor optical amplifiers measurements and General use throughout the laboratory 3 3 Representations of the rapidly scrambled SOPs The control and manipulation of the SOP is fundamental within the field of optics At the PS 700 s output a scrambled SOP is provided For those involved in fiber optic research development and manufacturing utilizing these rapid variations in SOP is at the heart of many applications The displayed image of Figure 4 shows an example of scrambled experimental data Two representations of the Stokes parameters are plotted in 3 space i e Poincar Sphere and the Observable Polarization Sphere both of which are equivalent from the standpoint of representing the data The Poincar representation is quite common For both spheres the data points plotted in red corresponds to front surface of the sphere blue the back surface 1 888 91 FIBER toll free F i be rC ontro 732 332 1860 telephone 732 332 1861 facsim
23. eein ene Bee eer peer eer iter eer neer peer E eer ree eenr arene rrr 25 Appendix A Key Operations Quick Reference 28 FiberControl Lightwave Polarization Solutions 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web xii Tables Table 1 Optical specifications sds ccccaxiccccesrcasiaienanieceeneiedsSixeinnceeebedcsuneiinde eonienenasas 4 Table 2 Instrumentation Control ccccccccececeeeeeseeeeeeeceeeeaeeseeeeeeeeeeeeeneaeeeees 5 Table 3 Line power and temperature ccccsesseeeeeeeeeeeeeeeeesseeeeeeeeeeeeeeeeeess 6 Table 4 Physical characteristics of the PS 700 ccccccccseeeeeeeeeeeeeeeeeeeeeeeeees 6 Table 5 SCPI command tree of PS 700 with ICS Electronics Model 4864 26 Table 6 PS 700 Scrambling Control with Form B relays ccceeeeeeeeeees 26 i 1 888 91 FIBER toll free FiberControl AA Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web xiii Figures Figure 1 One of the two left hand side rack mounting brackets for the PS 700 2 Figure 2 Front on view detailing dimensions of the rack mount capability of the Figure 3 Top down view of the partially assembled rack mounting brackets 3 Figure 4 Experimental data of the scrambled output displayed as a polarimetric plot on the Poincar Sphere and on the Observable Polarization Sphe
24. es Stationary SOP gt gt Tube2 gt Random Birefringence PZT PZT PZT Random Random Birefringence Birefringence Tube4 Tube5 Tube6 Output gt gt gt seudo random SOP R F Driver R F Driver R F Driver Figure 9 Block diagram showing the basic internal structure Shown in Figure 9 is a basic block diagram of the internal structure of the PS 700 Each PZT tube is shown in a cascade of six tubes each with its own r f signal from a unique drive circuit The separate r f drives provide independent modulation to each tube i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 15 Since there are only two well defined SOPs where scrambling does not occur the multiple set of tubes with random birefringence separating each provide opportunity for the following PZT tube to scramble those states that were ineffective in the previous Referring back to Figure 5 the top curve is a typical example measurement describing the behavior of the r f frequency components seen on a spectrum analyzer As mentioned earlier it represents the variation of the linear Stokes parameters at the output of the PS 700 Other third party scramblers produce one or two narrow peaks centered at the resonant frequency of the tube s e g centered at 1 MHz which is related to a simple well defined
25. fer your ideas and or criticisms We look forward to hearing from you and in meeting your needs in the field of polarization The Staff of FiberControl 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web Warranty and Restrictions FiberControl FC warrants material and production of the PS 700 for a period of 12 months from the shipping date During this warranty period FC will see to defaults arising from manufacturing via direct repair or replacement at FC s discretion For warranty repairs or service the unit must be sent back to FC U S A or to a place determined by FC The customer will be responsible for shipping costs to FC and in case of warranty repairs FC will cover the shipping costs back to the customer If no warranty repair is applicable the customer will be responsible to return shipping expenses In case of shipment from outside the United States all duties taxes etc arising from the transfer will be the responsibility of the customer FC warrants the hard firm and software designed by FC for this unit to operate fault free if they are handled according to our requirements However FC does not warrant a fault free and uninterrupted operation of the unit of the soft firm or hardware for any specific or special application s nor this instruction manual to be error free
26. for programming and control of the PS 700 In other situations where the PS 700 is integrated into an existing GPIB programming environment that existing IEEE 488 2 control environment can be used so that the software on the CDROM does not need to be used due to its conformity to the IEEE 488 2 Standard The PS 700 s GPIB accepts SCPI commands and command extensions to enable the scrambling to be turned on and off This is accomplished by operating internal relays The PS 700 s SCPI commands conform to SCPI Standard 1994 0 and provide an industry standard self documenting form of code that makes it easy for the programmer to maintain Each command can be used as a query except where noted The SCPI commands are not case sensitive The portion of the command shown in capitals denotes the abbreviated form of the keyword Either the abbreviated or whole keyword may be used when entering a complete command Optical polarization scrambling is controlled using the OPEN and CLOSE SCPI commands It is important to note that ICS Electronics standard product and as such is outlined within their Instruction Manual contains form A relays normally open FC replaced these with form B relays normally closed to reduce overall power consumption Therefore because the form B relays are normally closed at startup the PS 700 s default state is with scrambling enabled see Table 6 The IEEE 488 2 Standard mandated a list of common commands that are
27. ibercontrol com email www fibercontrol com web 6 9 MHz n n n l 0 0 00 1 0E 06 2 0E 06 30E 06 40E 06 5 0E 06 6 0E 06 7 0E 06 6 0E 06 90E 06 1 0E 07 10 oo k amp ke 3 2 fa a Frequency Hz Figure 5 Experimental data showing the distribution of the frequency components of the scrambling with the scrambler on and off The curves show frequency dependent intensity variations at the polarizers output that correspond to rapid changes in the SOP resulting from the PS 700 The lower curve scrambling off shows that aside from a very small peak near 1 25 MHz the source laser is stable and well behaved This r f spectral behavior is significantly different from other commercially available polarization state scramblers which produce only one or two well defined peaks Section 3 5 discusses in greater detail the inner working of the PS 700 3 4 Design Background Light emanating from many types of lasers is highly polarized and has a relatively constant state of polarization SOP The term SOP is a well known defining metric which describes a relative position of electric fields that make up light and which remains unaltered unless encountering birefringence Since there are many situations applications where highly polarized light with a constant SOP is 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fi
28. ile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web The Poincare Sphere Data set 0 x OF trol Research Polarimeter 8 FiberContro Wha File Polarimeter Communications Spheres Help Figure 4 Experimental data of the scrambled output displayed as a polarimetric plot on the Poincar Sphere and on the Observable Polarization Sphere An important scrambling figure of merit is the near uniform distribution of the SOPs in Stokes 3 space Figure 4 shows the distribution of SOPs from the PS 700 that was obtained in fewer than 5 seconds It s important to mention that most commercial polarimeters are not well suited for measurements at MHz scrambling rates since only a small portion of the originally generated independent SOPs is ever collected and displayed This is especially true in this case where sampling was limited by a third party polarimeter 2 ks sec and IEEE 488 2 GPIB interface lt 600 ks s For this reason alternative measurement techniques were developed to better test and represent the nature of high speed polarization scramblers i e r f based Figure 5 is a typical set of plots showing the r f spectral response viewed after an in line polarizer that follows a PS 700 scrambling on top curve and off lower curve 1 888 91 FIBER toll free F i be rCo ntro l 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info f
29. ingence produced by each tube perturbs the initial SOP from its original pseudo stationary position on the Poincar sphere R F Signal Optical Fiber Input Piezo Electric Tube PZT Figure 6 Basic piezo electric PZT tube shown with fiber wrapping Figure 6 shows the basic building block of the polarization scrambler It consists of a piezo electric ceramic tube wrapped with a length of single mode optical fiber The fiber is wrapped in a special manor and secured against the outside wall of the tube to insure proper operation during the application of the r f electrical signal Figure 7 below shows the cross sectional cut away view of the fiber wrapped PZT tube Also illustrated is the mechanical displacement of the tube that results from the r f electrical signal i 1 888 91 FIBER toll free F i be rCo ntrol 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 14 Wall of PZT Optical Fiber f N lt o Mechanical Movement Birefringence Stress Figure 7 Cross sectional view of PZT tube with fiber wrapping Small mechanical movement on the scale of microns stresses the fiber thus causing birefringence within the fiber Figure 8 shows the cross sectional view of the fiber with the resulting internal stresses generating the birefringence Also shown in Figure 8 is the angular orientation of linear elec
30. istors the address signals ADSW1 ADSW5 are switched to ground following a binary format i e the GPIB address is the sum of the binary weights of the grounded bits In addition it is required that the external address switch be enable using the following SCPI command SYST COMM GPIB ADDR EXT 1 via a personal computer in either the DOS or windows based the configuration programs 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 23 supplied on the ICS Electronics CD or others such as National Instruments niconf_w exe Since the GPIB board reads the external address switch during the power up phase the final steps are to save the configuration settings SAV 0 and cycle the power to the PS 700 from on to off wait a few seconds and back on For example to set the address to 0 Set ADSW1 ADSW5 to the off position SYST COMM GPIB ADDR EXT 1 in configuration program SAV 0 in configuration program Cycle power to PS 700 to re initialize GPIB card Refer to the ICS Electronics instruction manual that shipped with the PS 700 for additional information MODEL 4864 GPIB Relay Interface MODEL 2364 Serial Relay Interface Instruction Manual Publication Number 120144 October 2000 Edition Rev 3 ICS Electronics web listing is http www icselect com To change the GPIB address Ad
31. leaning 1 888 91 FIBER toll free F i be rC ontro 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web Ground Label Symbol Located on the inside of the PS 700 near the power supply is the symbol for the Protective Earth shown below This ground symbol is placed next to the green yellow striped ground wire that attaches near the power supply on the side of the enclosure and the ground connection on the power entry module Consistent with CE marking requirements this procedure ensures that all metal portions of the enclosure are properly grounded Protective Earth symbol Despite the grounding design and procedure the outside enclosure of the PS 700 is only to be cleaned with a lightly damp cloth regardless of the precautions and care undertaken by the user doing the cleaning 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web High Level View of this User Guide The FiberControl PS 700 s User Manual and Programming Guide is organized as follows Section 1 Setup and Preparation Section 2 Specifications and General Information Section 3 General Concepts and Applications Section 4 Front and Rear Panel Description Section 5 Remote Operation The PS 700 Command Set
32. oltage and fusing information located on the rear panel of the cs id 0 9 aor eee sore error re oer ere eee erent he re ce err EE OEA ser ete eee mens 24 ie 1 888 91 FIBER toll free FiberControl ae ees Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 1 Setup and Preparation 1 1 Tabletop Unit The PS 700 was designed primarily as a tabletop unit Four small rubber pads have been placed at the corners on the underside providing anti skid protection and to protect the table s surface While the placement of these rubber pads was chosen for upright positioning on a lab bench the PS 700 can be oriented in any desired direction i e upside down or on any of its sides with the only caveat being the equipment s secure placement to ensure the safety of the end user as well as others Plug the appropriate end of the provided power cord into the PS 700 s IEC 320 receptacle and the other end into a properly grounded electrical outlet Press the power rocker switch located on the back panel to the T position to turn on the power to the unit With the unit secured in place the optical fibers can be attached See 4 2 2 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 1 2 Rack Mounting the Tabletop Unit While the PS 700 polarization scrambler has been designe
33. rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web Assistance and Maintenance vi Calibration service and maintenance agreements for the PS 700 are available from FiberControl Assistance for proper product usage is also available Feel free to contact FiberControl via phone fax and or email for assistance FiberControl Lightwave Polarization Solutions 1 888 91 FIBER toll free 732 332 1860 telephone 732 332 1861 facsimile info fibercontrol com email www fibercontrol com web vii Hazard and Warning Labels Symbols The following symbols have been placed at various points on the PS 700 To ensure personal safety of users and those around them the user must be familiar with their meaning before operating the unit Assistance is available from FiberControl see Assistance and Maintenance and Warranty and Restrictions These symbols signify posted warnings where extreme caution is required therefore it is not recommended to proceed past them into the enclosure These symbols do not imply that FiberControl recommends the user to proceed inside the enclosure but instead that if the user does choose to proceed it must be with great caution Moreover entry into the enclosure not only incurs the risk of physical harm but also nullifies the PS 700 s warranty Placed on the back of the PS 700 is the following
34. re 10 Figure 5 Experimental data showing the distribution of the frequency components of the scrambling with the scrambler on and Off 5 11 Figure 6 Basic piezo electric PZT tube shown with fiber wrapping 13 Figure 7 Cross sectional view of PZT tube with fiber wrapping eeeeee 14 Figure 8 Details of stress induced birefringence in the fiber seeeeeeeeeeee 14 Figure 9 Block diagram showing the basic internal structure sseeeeees 15 Figure 10 Front view of PS 700 scscssecstccs se eccesnceeeesteveteriterateniteesee cee 17 Figure 11 Rear view of PS 00 icant eee eek edddedne 17 Figure 12 Rear panel depiction with an oval highlighting the location of the on off DOWER SWVC N is cic reactants eunasataccineea a eee eet 18 Figure 13 Depiction of front panel with an oval highlighting the location of the green LED that indicates the unit is powered Up ccccceeeeeeeeeeeeeeeeeeees 19 Figure 14 Front panel depiction with an oval to highlight the location of the GPIB Status a ce eee eee Cece eee cece KEETE EEEO pce ceeceuer eccececeeuecesereseeceenceares 20 Figure 15 Depiction of PS 700 s front panel with highlighted oval showing the locations of the optical input output connectors cccceeeeeeeeeeeeeeeeeeeeeeees 21 Figure 16 Rear panel depiction with an oval highlighting the location of the GPIB gic et eee ee E E 22 Figure 17 Line v
35. rresponding to unpowered O The oval in Figure 12 shows the location of the power switch receptacle and fuse holder FiberControl 1 732 332 1860 www fibercontrol com MADE IN USA SERIAL NO 2000000 PATENT PENDING Figure 12 Rear panel depiction with an oval highlighting the location of the on off power switch i 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 19 With the rocker switch pressed to the 1 position a green LED on the front panel will light indicating the unit is powered See Figure 13 Polarization State Srambler FiberControl Industries Figure 13 Depiction of front panel with an oval highlighting the location of the green LED that indicates the unit is powered up If the LED does not light verify that the power cord is connected and or that the line voltage is within the proper range see PS 700 input power specifications in section 2 To Power up the PS 700 Attach provided power cord by mating C13 plug to the PS 700 s IEC 320 receptacle then insert plug end into line power and push the rocker switch to the 1 position Green LED on the front panel will light LSTN RX GPIB status LED flashes once default RDY GPIB status LED lights Scrambler is now ready for operation The GPIB board within the PS 700 on power up r
36. tric field corresponding to the ideal interaction for scrambling Orientation of Electric Field Vector with no effect Ey Optimal Orientation of Electric Field Vector 8 Orientation of Electric Field Vector with no effect Time varying Time varying Birefringence Figure 8 Details of stress induced birefringence in the fiber i 1 888 91 FIBER toll free FiberControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web In general the two orthogonal SOPs shown in Figure 8 as E and Ey produce a minimum interaction between linear input SOPs and the time varying birefringence The maximum interaction occurs when the linear input SOP is orientated 45 degrees relative to these minimums This time varying birefringence enables scrambling provided the input SOP is properly aligned It is important to note that while there is two well defined SOPs corresponding to optimal scrambling there also exists only two well defined states where the converse is true i e where extremely poor scrambling occurs Understanding and making use of this detail is the basis of the polarization independent polarization scrambler R F Driver R F Driver R F Driver Random Random Birefringence Birefringence Input a PaT Tb
37. uns through a self test initialization process and momentarily blinks the LSTN RX LED on the lower portion of the front panel This momentary lighting of the LSTN RX LED indicates that the GPIB address is set to 4 This is the default GPIB address refer to 1 888 91 FIBER toll free F i be rControl 732 332 1860 telephone 732 332 1861 facsimile Lightwave Polarization Solutions info fibercontrol com email www fibercontrol com web 20 section 4 2 3 for additional information After the GPIB address is changed from its default setting when the PS 700 goes through its initialization process at startup a different LED or set of LEDs will light momentarily indicating the new GPIB address Immediately following this the left most LED RDY lights the PS 700 is available for use See Figure 14 Polarization State Srambler FiberControl Industries Figure 14 Front panel depiction with an oval to highlight the location of the GPIB status LEDs After the internal GPIB has run through its initialization process the RDY LED will light far left LED Powering down an energized PS 700 is a simple matter of rocking the switch to the 0 position All LEDs on the PS 700 specifically those at the upper right hand side of the front panel and associated with the GPIB will dim slowly over the course of a few seconds If so desired the power cord can now be removed from the back panel s IEC 320 receptacle To Power down
Download Pdf Manuals
Related Search