Optical fiber communication equipment and its applied optical systems
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United States of America Patent
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Jan 16, 2007
Grant Date -
May 2, 2002
app pub date -
Mar 15, 2001
filing date -
Mar 31, 2000
priority date (Note) -
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status (Latency Note)
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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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