Optical transmitter apparatus

Details Optical transmitter apparatus Optical transmitter apparatus

2011-05-03

2011-05-03

Li, Shi K (Department: 2613)

Optical communications

Transmitter

Including compensation

C398S188000

Reexamination Certificate

active

07936998

ABSTRACT:
An optical DQPSK modulator comprises a pair of phase modulators. Each of the pair of the phase modulators is provided with first and second driving signals. The first and second driving signals are amplified by first and second amplifiers, respectively. An RZ intensity modulator generates an optical RZ-DQPSK signal from an optical DQPSK signal output from the optical DQPSK modulator. A photodetector generates a monitor signal from the optical RZ-DQPSK signal. A gain adjuster unit adjusts the gains of the first and second amplifiers so as to minimize the power of the monitor signal.

REFERENCES:
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patent: 2004/0081470 (2004-04-01), Griffin
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patent: 2005-284129 (2005-10-01), None
patent: 2006-47746 (2006-02-01), None
Restriction Requirement from U.S. Appl. No. 11/383,768, May 2009.
Notice of Allowance from U.S. Appl. No. 11/383,768, Sep. 2009.

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