POS-20X
Reset-Free Polarization Stabilizer - PolaStay^TM

PolaStay™ polarization stabilizers actively maintain a stable output state of polarization (SOP) against rapid input SOP fluctuations, compensating for an input polarization discontinuity in as fast as 5 ms, or tracking without resets against a continuous input SOP rotation of up to 32π/s. This unique family of products combine General Photonics’ polarization controller, in-line polarization monitor, and proprietary algorithm to find and maintain the target SOP.

Figure 1 : POS-202 & 203 Reset-Free Polarization Stabilizer

The instrument’s output fiber can be either single mode fiber or PM fiber with the output polarization aligned to its slow axis. When a polarizer is placed at the output, the maximum power fluctuation caused by input polarization fluctuation is less than 0.1 dB. These instruments can be used to eliminate polarization fluctuations in fiber systems, suppress noise figure in optical amplifiers, reduce PDL effects, demultiplex polarization division multiplexed channels, and eliminate polarization fading in coherent communication and fiber sensor systems. The POS-20X features a bright OLED display for easy setup and optimization of operation parameters such as control step size, feedback delay, activation threshold, and minimum or maximum search. It can accept either optical or electrical feedback. The POS-20X line includes 3 different configurations (X=2, 3, or 4) to meet different application requirements.