Optical receiver module and optical receiver module system

Details Optical receiver module and optical receiver module system Optical receiver module and optical receiver module system

2005-09-01

2008-12-16

Vanderpuye, Kenneth N (Department: 2613)

Optical communications

Receiver

Including postcompensation

C398S202000, C398S208000, C398S025000, C398S028000, C398S029000

Reexamination Certificate

active

07466930

ABSTRACT:
A relation between a light input power monitor value of an optical transmission signal before passing through a fiber and an input signal amplitude monitor value is recorded in advance in a storage device. Next, actual optical-transmission-waveform is inputted into an optical receiver module, and then comparisons between a light input power monitor value and an input signal amplitude monitor value, and respective monitor values in the case without having the waveform distortion as described above are performed in an operation device to calculate a waveform distortion value. According to the waveform distortion level calculated herein, an optimum threshold value and an optimum phase adjusting value, at which receiver sensitivity is maximized, are calculated in the operation device to control a threshold-value adjusting circuit and a phase-value adjusting circuit, thereby a threshold value and a phase value that are optimum for an input distortion level can be established.

REFERENCES:
patent: 6871024 (2005-03-01), Nishimoto et al.
patent: 6915076 (2005-07-01), Mittal et al.
patent: 7127391 (2006-10-01), Chang et al.
patent: 2003/0161640 (2003-08-01), Kimura
patent: 2004/0179837 (2004-09-01), Bock et al.
patent: 1 187 372 (2001-08-01), None
patent: 2002-208892 (2002-07-01), None
patent: 2004-254333 (2004-09-01), None
European Search Report Issued in European Patent Application No. 05018731.9-1246, dated on Nov. 5, 2007.

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