Optical reception device

Details Optical reception device Optical reception device

2004-12-28

2011-11-15

Li, Shi K (Department: 2613)

Optical communications

Receiver

C398S203000, C398S204000, C398S213000

Reexamination Certificate

active

08059971

ABSTRACT:
An optical reception device realizes stabilization of reception sensitivity inexpensively and highly precisely. The optical reception device includes: a Mach-Zehnder type 1-bit delay unit including a one-terminal input port and two-terminal output ports for decoding an optical difference phase shift keying (DPSK) signal and provided with one or more phase control functions to control the phase state of light; photoelectric conversion means for branching a portion of an optical output signal output from the one-side output port of the Mach-Zehnder type 1-bit delay unit, to convert the branched portion into an electric signal; and a phase control unit for controlling the phase state of the Mach-Zehnder type 1-bit delay device by using as an error signal the output signal of the photoelectric conversion means.

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