Optical transmitter modules
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United States of America Patent
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Aug 30, 2005
Grant Date -
Apr 10, 2003
app pub date -
Mar 5, 2002
filing date -
Oct 10, 2001
priority date (Note) -
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Abstract
A subject of the invention is to reduce the temperature dependence of an etalon as a wavelength locker for a semiconductor laser device and so forth. Concretely, it is to restrict the lowering of the wavelength locking performance of the etalon dependent on the temperature variation. A means to solve the subject is the use of an air gap etalon. Concretely, the means is provided with a media plate and parallel plane plates on both sides of the media plate. The two parallel plane plates and the space between them constitute the air gap etalon.
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