Optical transmitter and its control method

Details Optical transmitter and its control method Optical transmitter and its control method

2007-08-14

2007-08-14

Phan, Hanh (Department: 2613)

Optical communications

Transmitter

Including compensation

C398S182000, C398S183000, C398S184000, C398S186000, C398S187000, C398S188000, C398S189000, C398S192000, C398S193000, C398S194000, C398S195000, C398S196000, C398S197000, C398S199000

Reexamination Certificate

active

10628553

ABSTRACT:
An optical transmitter comprises an amplitude modulation unit performing amplitude modulation of only a one-side amplitude of a main signal with a low-frequency signal having a predetermined frequency. An optical modulator receives an input signal generated after the one-side amplitude modulation, and modulates an incoming light in response to the received signal in accordance with a predetermined modulation-characteristic curve to output an optical output signal. An operating point control unit applies a predetermined bias voltage to the optical modulator to control a level of the input signal substantially applied to the modulation-characteristic curve so that the one-side amplitude of the main signal is applied to a minimum portion of the modulation-characteristic curve of the optical modulator.

REFERENCES:
patent: 2001/0007508 (2001-07-01), Ooi et al.
patent: 0 488 226 (1992-06-01), None
patent: 0 877 495 (1998-11-01), None
patent: 2 269 067 (1994-01-01), None
patent: 3-251815 (1991-11-01), None
patent: 5-142504 (1993-06-01), None
patent: 2642499 (1997-05-01), None

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