Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2006-09-05
2006-09-05
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S050110, C372S096000, C372S102000
Reexamination Certificate
active
07103081
ABSTRACT:
This invention provides a semiconductor laser that enables to oscillate at a wavelength defined by a Bragg grating formed therein in a wide temperature range without any temperature-controlling. The semiconductor laser comprises an active region and the Bragg grating formed with the active region. A light-emitting surface and a light-reflecting surface are formed so as to sandwiches the active region. The light-emitting surface has an anti-reflective coating, the reflectivity of which is so adjusted that the minimum thereof is at the wavelength where the gain attributed to the FP modes is the maximum and is smaller than 0.3%.
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Mitsuo Fukuda, “Reliability and Degradation of Semiconductor Lasers and LEDs”, dated Nov. 14, 2003 pp. 72-76.
Japanese Office Action and English language translation dated Jun. 28, 2005.
Golub Marcia A.
Harvey Minsun
Smith , Gambrell & Russell, LLP
Sumitomo Electric Industries Ltd.
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