Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2008-07-22
2008-07-22
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S050124
Reexamination Certificate
active
07403553
ABSTRACT:
An optical structure that reduces the effects of spontaneous emissions from the active region of a laser. An optical structure includes optimizations to reduce the effects of spontaneous emissions. The optical structure includes a VCSEL with top and bottom DBR mirrors and an active region connected to the mirrors. The optical structure further includes a photodiode connected to the VCSEL. One or more optimizations may be included in the optical structure including optically absorbing materials, varying the geometry of the structure to change reflective angles, using optical apertures, changing the reflectivity of one or more mirrors, changing the photodiode to be more impervious to spontaneous emissions, and using ion implants to reduce photoluminescence efficiency.
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U.S. Appl. No. 11/027,383, filed Dec. 30, 2004 entitled “Geometric Optimizations for Reducing Spontaneous Emissions in Photodiodes.”
U.S. Appl. No. 11/026,355, filed Dec. 30, 2004 entitled “Optical Apertures for Reducing Spontaneous Emissions in Photodiodes.”
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Biard James R.
Guenter James K.
Tatum Jimmy A.
Finisar Corporation
Harvey Minsun
Nguyen Phillip
Workman Nydegger
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