Optical transmission device

Details Optical transmission device Optical transmission device

2011-08-16

2011-08-16

Li, Shi K (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S182000, C398S183000, C398S198000

Reexamination Certificate

active

08000612

ABSTRACT:
An optical transmission device is provided with an external optical modulator including three or more Mach-Zehnder interferometers and outputs a single-sideband optical intensity-modulated signal with suppressed optical carrier component, wherein an optical carrier component and an unnecessary one sideband component contained in the outputted optical signal are suppressed. A light branching section (51) branches an optical signal outputted by an external optical modulator (4) into two signals. A photodetector section (52) converts one of the optical signals to an electric signal. An optical carrier component extracting section (54) extracts an optical carrier component signal that is in the vicinity of a frequency f1from the electric signal. An optical carrier component suppressing section (56) applies a bias voltage for suppressing the optical carrier component to the external optical modulator (4) based on the signal level of the optical carrier component. A vestigial sideband component extracting section (57) extracts a vestigial sideband component signal in the vicinity of a frequency 2×f1from the electric signal. A vestigial sideband component suppressing section (59) applies a bias voltage for suppressing an unnecessary one sideband component to the external optical modulator (4) based on the signal level of the vestigial sideband component.

REFERENCES:
patent: 5170274 (1992-12-01), Kuwata et al.
patent: RE36088 (1999-02-01), Kuwata et al.
patent: 7561810 (2009-07-01), Noguchi et al.
patent: 2001/0005437 (2001-06-01), Masuda et al.
patent: 2002/0171900 (2002-11-01), Ono et al.
patent: 2004/0109697 (2004-06-01), Chiappetta
patent: 2004/0136730 (2004-07-01), Fuse et al.
patent: 2004/0218930 (2004-11-01), Dorrer et al.
patent: 2004/0228602 (2004-11-01), Livas et al.
patent: 2004/0247325 (2004-12-01), Watanabe
patent: 2005/0008374 (2005-01-01), Taneda
patent: 2005/0089027 (2005-04-01), Colton
patent: 2007/0019968 (2007-01-01), Hashimoto et al.
patent: 2007/0134006 (2007-06-01), Krieg
patent: 2007/0269223 (2007-11-01), Noguchi et al.
patent: 2009/0034988 (2009-02-01), Akiyama et al.
patent: 2009/0201564 (2009-08-01), Tian et al.
patent: 6-67128 (1994-03-01), None
patent: 2642499 (1997-05-01), None
patent: 2001-133824 (2001-05-01), None
patent: 2001-244896 (2001-09-01), None
patent: 2002-221698 (2002-08-01), None
patent: 2004-302238 (2004-10-01), None
patent: 2004-318052 (2004-11-01), None
patent: 2004318052 (2004-11-01), None
English Translation of JP-2004-318052.

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