Optical communications – Transmitter – Including specific optical elements
Reexamination Certificate
2007-01-16
2007-01-16
Chan, Jason (Department: 2613)
Optical communications
Transmitter
Including specific optical elements
C398S182000, C398S095000, C398S196000, C372S020000, C372S032000, C372S034000
Reexamination Certificate
active
09814693
ABSTRACT:
An object of disclosed technology is to control lasing wavelengths so that a wavelength shift does not occurs. Another object is to permit wavelengths of a light source for wavelength division multiplexing optical-fiber communication system to be variable in response to an ITU-TS grid. A means for achieving the objects is as follows: locating an etalon in a light path of diode laser light, which is a parallel plane wave changed by a collimator lens; generating a wavelength error signal from a difference between both of divided pieces of light from transmitted light or reflected light; and locking a wavelength of a diode laser device according to the wavelength error signal.
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European Search Report based European Serial No. 01106351, dated Apr. 16, 2004.
Baba Naohiko
Ido Tatemi
Iwafuji Yasunori
Kuwano Hideyuki
Tatsuno Kimio
Chan Jason
Curs Nathan
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Opnext Japan, Inc.
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