Semiconductor laser module
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United States of America Patent
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Nov 30, 1999
Grant Date -
N/A
app pub date -
Feb 20, 1998
filing date -
Feb 21, 1997
priority date (Note) -
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Abstract
A semiconductor laser module in which: the distance between a semiconductor laser chip and a diffraction grating can be shortened; the light output spectrum is stabilized; and the output characteristic does not fluctuate due to the external condition. In the semiconductor laser module, a diffraction grating structure is constituted in an optical fiber by at least two diffraction gratings for reflecting light with different wavelengths respectively. The diffraction grating structure is formed in a place corresponding to the inside of the package or the inside of the coupling means.
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