Model 4810 Polarization Extinction Ratio Meter PER
Contents
1. Model 4810 Polarization Extinction Ratio Meter OOOO iy Spectrometer Unparalleled PER Performance The 4810 Polarization Extinction Ratio Meter is the first PER meter to allow characterization of devices to over 70 dB A combination of excellent measurement dynamic range high resolution polarization state setability and advanced algorithms support this new capability Spectrum Analyzer CSA Component Low Cost For up to 60 dB PER and using existing polarization controller the total system cost is quite affordable A new precision high speed polarization controller from dBm Optics will be available soon and this will bring even the highest PER measurement cost down to affordable levels C omplete Fast Affordable _ _ __ _ _ Dispersion Measurement Fast Measurement li M J5 a With the dBm Optics 4810 even the highest PER levels can be 68 amp 6 D measured in just a few minutes Achieving lower PER further reduces the measurement time The 4810 can be set up to trade off the measurement time and the guaranteed PER measurement accuracy u D k 5 B Characterization Fully Automatic There is no software to write no system integration Simply connect a device to the 4810 and press start 4810 handles everything automatically PER Meter Measure Polarization Extinction Ratio up to gt 70 dB Fast Measurement time for PER e lt 40 dB in2. lt 1 second e lt 50 dB in lt 60 seconds e lt 72 dB in lt 4 minutes gt 100 dB total dynamic range gt 65 dB dynamic range at full speed Large color display makes data visualization and analysis simple Communicate over GPIB or Ethernet Exchange data using a USB flash drive System can also measure ORL and IL vs Wavelength 4 year warranty Component Characterization Instruments info dbmoptics com www dbmoptics com 303 464 1919 Model 4810 Polarization Extinction Ratio Meter Overview Data entry and instrument setup are easy with the USB flash drive allows High resolution Esvileinknob simple data transfer 4 x6 display brings data to life Built in Ethernet mn 1 or 2 channels available accessibility over a Measurements The dBm Optics CSA is an network from a desktop from 0 01 to a ne from home or another 00 00L tee Proprietary measurement option it more than two remote location via a VPN high speed GPIB i PS technology yields 0 005dB channels are needed makes the 4810 easy to integrate into any automated test rack repeatability Model 4810 Polarization Extinction Ratio Meter 2x2 Shutter Pol Cntr g LO PDSR Splitter Future Precision Arbitrary Polarization State Return Controller Loss Measurement optional Real time Power Monitor optional Optional Optional Enhanced gt 120dB Extinction High speed Ratio Shutter Shutter provides automatic Real time dark current c
3. 1490 DFB 1310 FP 1550 DFB or any of 1480 DFB 980 SM 980 MM Flexcore 5 125 1490 FP 1310 DFB 1550 FP or any wavelength from 1519 to 1630 nm DFB Extinction ratio enhancement extended PER Built in variable attenuator 0 20 dB Copyright 2005 2004 2003 1998 dBm Optics Inc All rights reserved dBm Optics Component Spectrum Analyzer u Fine Real Time Reference and Beam Block Shutter and all other dBm Optics product names are trademarks or registered trademarks in the U S A or other countries All other trademarks mentioned herein are the property of their respective companies Products described in this catalog may be covered by one or more patents in the U S A and in other countries Information in this catalog is subject to change without notice info dbmoptics com www dbmoptics com 303 464 1919
4. alibration System can operate with reference when critical for super high PER either 8169 or Adaptif accurate IL is measurement polarization controllers also required info dbmoptics com www dbmoptics com 303 464 1919 Model 4810 Polarization Extinction Ratio Meter System Configurations For Moderate Level Extinction Ratio Applications If the maximum extinction ratio device to be measured is 55 dB or less the 953E option for the 4810 can be used This utilizes the 8169AS external polarization controller The 4810 controls the 8169 via the rear panel GPIB controller port that comes with the 953E The first state sets the polarizer in the 8169 to maximize the power through from the laser source Then the 4810 performs an optimized search for the half and quarter waveplates that constitute the 8169 polarization control The 958I a precision high speed internal polarization controller will soon be available from dBm Optics The 958I can be used as a direct replacement for the 953E for PER measurement PER measurement system with a upcoming dBm Optics built in controller or by using an existing external 8169 controller info dbmoptics com www dbmoptics com For Very High Level Extinction Ratio Applications If the maximum extinction ratio is above 55 dB and up to lt 75 dB then the system must be configured with either an external Adaptif polarization controller model 100 or model 3000 or with the soon to b
5. e released dBm Optics 958I precision high speed internal polarization controller When utilizing the Adaptif controller the dBm Optics 4810 controls the Adaptif via the rear panel GPIB controller port that comes with the 953E There is a complex algorithm performed by the dBm Optics 4810 to optimize the search for the single half waveplate and and four quarter waveplates that constitute the Adaptif polarization controller All of the measurement is automated Note that the selection of the TLS to be used is critical for high PER applications The laser power should be high 2 dBm for gt 68 dB PER with very low STSE signal to total spontaneous emission The SSE spontaneous emission is not a polarized signal so the STSE places a floor below the best PER measurement possible The older Agilent tunable lasers have a high power output but the low SSE output is generally only 7 dBm limiting the measurement to approximately 60 dB The newer Agilent TLS s are much higher power for low STSE The New Focus 6500 is ideal for this application PER measurement system with an Adaptif multi stage LiNb polarization controller 303 464 1919 Spectrometer Spectrum Analyzer CSA Component Dispersion Measurement u D k 5 B a Characterization Intrinsic Component Characterization Instruments Model 4810 Polarization Extinction Ratio Meter PER Measurement Background Intrinsic Versus Aligned PER Angle R
6. esolution and Very High PER The key performance measure for a raw polarizer device is To achieve very high PER The angle control must be very high to the polarizer s intrinsic extinction ratio Intrinsic PER can be achieve very high PER or the minima of the curve could be thought of as if the alignment to the device is perfect then missed If we look closely around the minima we can see that to what would the device PER result be In contract aligned achieve 70 dB PER measurement we need angle resolution at or PER includes the effect of the misalignment of the connector below 0 02 degrees relative to the intrinsic PER Aligned PER is always lower than intrinsic PER Tranainl sion dD Insertion Loss versus Polarization State sneno The chart below shows how the insertion loss of a polarizer sacom changes with polarization state The function is a cos2 ppan function 10000 00000000 Tranemission dE 100 0000000 0 0000000 10 The table below outlines the angle accuracy necessary to achieve various PER levels Maximum Extinction If we zoom in on the narrow well we can see the very sharp Angle Setability Ratio Measurement edges of the transfer function Degrees on Sphere Approximate 0 5 degrees 40 dB 0 2 degrees 50 dB 30 0000000 Additional Obstacles There are many other considerations in measuring very high PER Please contact us for a copy of our application note on measuring h
7. igh PER info dbmoptics com www dbmoptics com 303 464 1919 Model 4810 Polarization Extinction Ratio Meter a a Specifications Input connections Selectable from among the following at time of ordering Model FC FC APC or FC PC Model SC Model DN DIN Model BF Bare fiber interface Other connectors available upon request Speed per channel Variable measurement speed from 100K rps to 0 1 rps System transmit speed Transmitting to host with Ethernet is 3 Mbytes sec dedicated link with GPIB 1 7 Mbytes sec into a PC Multiple channel speed 100 K rps per channel speed regardless of number of channels Trigger latency 2 Display 4 x6 graphical display VGA 800 x 600 TFT LCD color Warm up time 60 minutes to full specifications useable immediately after turn on 16 8 w x 16 4 d x 5 25 h 42 6 cm x 41 cm x 10 5 cm 1 Trigger latency defined as total time from trigger edge to initiation of measurement Swept Spectrometer Spectrum Analyzer CSA Component CSA Dispersion Measurement u g 5 B E Characterization Component Characterization Instruments info dbmoptics com www dbmoptics com 303 464 1919 Ordering Information Standard accessories USB flash memory card power cord user manual Remote Power Meter Module 800nm 1700nm Precision Power Meter Module 800nm 1700nm with Analog Output Laser Diode Sources 1 5 sources Specify 1 5 of the most common sources
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