Optical communications – Transmitter – Including compensation
Reexamination Certificate
2006-04-18
2006-04-18
Sedighian, M. R. (Department: 2633)
Optical communications
Transmitter
Including compensation
C398S182000, C398S183000, C398S186000
Reexamination Certificate
active
07031620
ABSTRACT:
An optical transmission system includes a current source for outputting a drive current, a semiconductor laser for converting the drive current into a stimulated emission light and producing the same, a drive circuit for converting a transmission data signal into a modulation control signal and outputting the same, an optical modulator for receiving the stimulated emission light and a shading control signal for interrupting light emission and producing and outputting transmission signal light by changing an amount of transmission of the stimulated emission light according to the shading control signal, and a shading element for receiving the transmission signal light and a shading control signal for interrupting light emission and interrupting the transmission of the transmission signal light according to the shading control signal whereby an optical signal having wrong optical wavelength is rapidly prevented.
REFERENCES:
patent: 5343324 (1994-08-01), Le et al.
patent: 2000-089178 (2000-03-01), None
Akashi Mitsuo
Baba Naohiko
Honzawa Yoichi
Satoh Hideki
Tokita Shigeru
OpNext Japan, Inc.
Sedighian M. R.
Townsend and Townsend / and Crew LLP
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