Dispersion compensation type optical signal receiving...

Details Dispersion compensation type optical signal receiving... Dispersion compensation type optical signal receiving...

2007-03-23

2010-06-22

Sedighian, M. R. (Department: 2613)

Optical communications

Receiver

Including postcompensation

C398S207000, C398S212000, C398S159000, C398S147000

Reexamination Certificate

active

07742706

ABSTRACT:
A dispersion compensation type optical signal receiving apparatus includes: an APD element for converting input signal light inputted from a transmission line into an electric signal; an amplifying device constituted with a preamplifier circuit and a limit amplifier circuit, which amplifies the electric signal converted by the APD element; an EDC IC for compensating the dispersion in the transmission line electrically; and a clock/data reproducing circuit for reproducing the clock and data signal contained in the input signal light, wherein there is provided a VOA for limiting the amplitude of the input signal light inputted to the APD element and an attenuation amount controlling circuit for controlling the attenuation amount of the VOA in accordance with the bias current of the APD element.

REFERENCES:
patent: 6665497 (2003-12-01), Hamilton-Gahart et al.
patent: 2005/0254825 (2005-11-01), Bai et al.
patent: 04-275468 (1992-01-01), None
patent: 4-275468 (1992-10-01), None
patent: 2953799 (1999-07-01), None
patent: 2000-031904 (2000-01-01), None

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