DQPSK receiver phase control

Optical communications – Receiver – Heterodyne

Reexamination Certificate

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Details

C398S077000, C398S209000

Reexamination Certificate

active

07389055

ABSTRACT:
An optical receiver for receiving an optical differential phase shift keyed signal has an optical component sensitive to the optical phase of the signal, such as an interferometer, a device arranged to generate a control signal by non linear limiting of an output of the optical component, such as an RF amplifier arranged to operate in a region near saturation point, and a phase controller for tuning a phase response of the optical component to the received signal according to the control signal.

REFERENCES:
patent: 6097768 (2000-08-01), Janesch et al.
patent: 6590860 (2003-07-01), Sakoda et al.
patent: 2001/0031024 (2001-10-01), Petersen et al.
patent: 2004/0081470 (2004-04-01), Griffin
patent: 2004/0141222 (2004-07-01), Miyazaki et al.
patent: 2005/0111855 (2005-05-01), Bissessur
patent: 2005/0286911 (2005-12-01), Doerr et al.
patent: 2006/0067703 (2006-03-01), Haunstein et al.

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