Input signal detection device

Details Input signal detection device Input signal detection device

2008-03-28

2011-12-06

Sedighian, M. R. (Department: 2613)

Optical communications

Receiver

C398S033000, C398S025000, C398S038000

Reexamination Certificate

active

08073343

ABSTRACT:
According to an aspect of an embodiment, a signal detector device includes a first monitor unit, a second monitor unit, and a discrimination unit, wherein the discriminator unit discriminates whether an inputted light includes a signal light on the bases of the first monitor unit for monitoring an intensity of the inputted light and the second monitor unit for monitoring an alternating current component intensity of the inputted light.

REFERENCES:
patent: 5805319 (1998-09-01), Chuzenji
patent: 7212741 (2007-05-01), Myong et al.
patent: 2004/0067057 (2004-04-01), Akiyama et al.
patent: 2004/0126108 (2004-07-01), Chung et al.
patent: 9-200157 (1997-07-01), None
patent: 2004-112427 (2004-04-01), None
Office Action issued by the Japanese Patent Office on Jul. 26, 2011 in the corresponding Japanese patent application No. 2007-087848.

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