| US 7,454,092 B2 | ||
| Systems and methods for polarization mode dispersion mitigation | ||
| Er'el Granot, Herzliya (Israel); Shalva Ben-Ezra, Rehovot (Israel); Gil Blecher, Petach Tikva (Israel); Shai Tzadok, Petach Tikva (Israel); Reuven Zaibel, Gan Yavne (Israel); Roni Dadon, Ashdod (Israel); Motti Caspi, Rishon LeZion (Israel); Haim Chayet, Nes-Ziona (Israel); Yehuda Ganz, D.N. Karkur (Israel); and Arieh Sher, Rehovot (Israel) | ||
| Assigned to Kailight Photonics, Inc., Horsham, Pa. (US) | ||
| Filed on Oct. 24, 2006, as Appl. No. 11/585,651. | ||
| Prior Publication US 2008/0095487 A1, Apr. 24, 2008 | ||
| Int. Cl. G02B 6/00 (2006.01) | ||
| U.S. Cl. 385—11 | 16 Claims |
| 1. A polarization mode dispersion (PMD) mitigation apparatus comprising:
a PMD mitigation device optically coupled to receive an optical input signal comprising a clock frequency (fc) and a polarization mode scrambler frequency f on an optical input line and output an optical output signal on an optical
output line;
an optical detector optically coupled to the optical output line, where the optical detector is operable to receive a portion
of the optical output signal having the clock frequency (fc) and the polarization mode scrambler frequency f and to convert the optical output signal into an electrical signal;
a radio-frequency (RF) bandpass filter electrically coupled to the optical detector, where the RF bandpass filter is operable
to filter the electrical signal and is tuned to a frequency and bandwidth 2f selected from the group consisting of: fc±f and fc/2±f; and
an RF detector electrically coupled to the RF bandpass filter, where the RF detector is operable to measure an intensity of
the filtered electrical signal.
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