Reset-Free Polarization Tracker – PolaStay™ - General Photonics - #1

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GP-DS-POS-002-20 1/5/10 The PolaStay™ polarization tracker automatically adjusts the state of polarization (SOP) towards a reference SOP, counteracting continuous input SOP variations as fast as 0.7 ms with no resets. The reference SOP is determined by a feedback signal which can be provided either internally or externally. The internal feedback version (POS-002-I) consists of a fiber squeezer polarization controller, in-line polarization monitor, digital and analog circuits, and proprietary algorithm. The error signal from the polarization monitor is fed back to the polarization controller to maintain a linear SOP at the output. The external feedback version (POS-002-E) replaces the internal polarization monitor with an external analog electrical feedback signal of the user’s choice, such as a voltage proportional to the degree of polarization (DOP) measured by a polarimeter, the bit-error rate (BER) from a BER chip, the RF spectrum of a detected signal, or the optical power after a polarizer. The output fiber can be either single mode fiber or PM fiber with the SOP aligned to its slow axis. This module can be used for PMD compensation, polarization division demultiplexing, elimination of polarization fading in coherent detection and fiber sensor systems, suppression of noise figure in optical amplifiers, and reduction of PDL effects. General Photonics Corp. 5228 Edison Ave. Chino, CA 91710 Tel: 909.590.5473 Fax: 909.902.5536 Email: info@generalphotonics.com Website: www.generalphotonics.com Reset-Free Polarization Tracker –PolaStay™ POS-002 Operating Wavelength Range1 1260 to 1650 nm SOP recovery time 50 dB Isolation in orthogonal polarization 20 dB Optical input power -15 dBm to 20 dBm standard for internal feedback version (low power option available) External feedback voltage 0 to 4.6 volts for external feedback version Optical Power Handling 20 dBm max., higher possible Optical Power Damage Threshold 300 mW Operating Temperature 0 to 70°C Storage Temperature -20 ~ 70 °C Power Supply +12 VDC / 0.5A -12VDC / 0.15A Communications Interface RS-2323 Dimensions 0.75”(H) x 3.8” (W) x 7.25” (L) Notes: Specifications listed above are for the standard configuration with internal feedback option; specs may be different for instruments with different wavelength or input power ranges. 1. Wavelength range listed is for standard version with SM output. Wavelength ranges will be different for versions with PM output. Applications: PMD compensation Polarization demultiplexing Elimination of polarization fading Coherent detection Ordering Information: POS – 002 – X -- XX Unique Features: Reset free operation 0.7 ms recovery time 47ð/s tracking speed Plug and play Feedback I: Internal E: External Preliminary Specifications Output fiber type: SM PM 2. The output power fluctuation caused by SOP fluctuation after passing through a polarizer. 3. Requires a special cable (included).