Coherent optical detection and signal processing method and...

Details Coherent optical detection and signal processing method and... Coherent optical detection and signal processing method and...

2008-11-28

2009-10-27

Leung, Christina Y (Department: 2613)

Optical communications

Receiver

Heterodyne

C398S208000

Reexamination Certificate

active

07609979

ABSTRACT:
A method and system of coherent detection of optical signals. The system utilizes a digital signal processor to recover an incoming optical signal. The system employs a local oscillator, which does not need to be phase locked to the signal. The signal may be consistently recovered, even when the polarization state varies over time. Additionally, the signal may be recovered when it comprises two channels of the same wavelength that are polarization multiplexed together. In addition, any impairment to the signal may be reversed or eliminated.

REFERENCES:
patent: 5060312 (1991-10-01), Delavaux
patent: 5115332 (1992-05-01), Naito et al.
patent: 5146359 (1992-09-01), Okoshi et al.
patent: 7110677 (2006-09-01), Reingand et al.

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