Polarization dependent loss loop

Details Polarization dependent loss loop Polarization dependent loss loop

2007-04-17

2007-04-17

Pak, Sung (Department: 2874)

Optical waveguides

Polarization without modulation

C359S494010, C359S490020, C398S152000, C398S184000

Reexamination Certificate

active

10693774

ABSTRACT:
A system and method for reducing polarization dependent loss in optical circuits is disclosed. The system includes a first optical device having an output, and a polarization controller optically coupled to the first optical device for adjusting a polarization state of the output of the first optical device. The system further includes a second optical device optically coupled to the polarization controller. Adjusting the polarization state of the output of the first optical device alters a total polarization-dependent loss for the cascaded device system. A series of fiber optic loops can be used to adjust the output of the first optical device. A PDL measuring device can be inserted after the second optical device to provide feedback to the polarization controller, so that the controller may be tuned to adjust the polarization to a desired state.

REFERENCES:
patent: 5473457 (1995-12-01), Ono
patent: 6385356 (2002-05-01), Jopson et al.
patent: 6493474 (2002-12-01), Yao
patent: 2003/0048973 (2003-03-01), Asami
patent: 2003/0174400 (2003-09-01), Patel et al.

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