Device and method for compensating for polarization mode...

Details Device and method for compensating for polarization mode... Device and method for compensating for polarization mode...

2006-03-07

2006-03-07

Kang, Juliana (Department: 2874)

Optical waveguides

Polarization without modulation

C398S147000, C398S158000

Reexamination Certificate

active

07010181

ABSTRACT:
A device for compensating for PMD occurring in a transmission optical fiber in an optical transmission system. An output beam from an optical fiber link changes its polarization state by a polarization controller (PC) to be applied to a PBS. A first polarization component passes through a variable delay line, rotates by a predetermined angle, and is inputted to the PBS. A portion of a second polarization component is transmitted by a predetermined mirror. The reflected second polarization component is applied to the PBS to be combined with the first polarization component inputted to the PBS. The transmitted second polarization component passes through a photo-detector and a BPF. The filtered signal is inputted to a PC controller to select the smaller value among the currently and previously measured power values.

REFERENCES:
patent: 5659412 (1997-08-01), Hakki
patent: 5859939 (1999-01-01), Fee et al.
patent: 5930414 (1999-07-01), Fishman et al.
patent: 6130766 (2000-10-01), Cao
patent: 6236495 (2001-05-01), Moeller
patent: 6604871 (2003-08-01), Cao
patent: 2002-183541 (2001-06-01), None
B.W.Hakki, “Polarization Mode Dispersion Compensation by Phase Diversity Detection”; IEEE Photonics Tech. Ltrs., vol. 9, No. 1, Jan. 1997 (pp121-123).

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