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Polarization stabilizer using liquid crystal rotatable waveplates

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3 Author(s)
Chiba, T. ; Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan ; Ohtera, Y. ; Kawakami, Shojiro

In standard single-mode fiber (SMF) transmission systems, a polarization stabilizer is useful for optimizing the performance of polarization dependent systems or devices. We have proposed and developed a polarization stabilizer which employs liquid crystal (LC) rotatable waveplates. It has a simple configuration, no moving parts, and endless-control characteristic. High polarization stability was confirmed under various state of polarization (SOP) fluctuations. The maximum response speed of the polarization stabilizer is about 900°/s, but this can be increased by improving the controller. We applied the polarization stabilizer to a semiconductor optical amplifier (SOA) having polarization dependence, and achieved good gain stabilization

Published in:

Lightwave Technology, Journal of  (Volume:17 ,  Issue: 5 )