Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2010-06-07
2011-11-15
Park, Kinam (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S050121, C372S050110, C372S050100
Reexamination Certificate
active
08059690
ABSTRACT:
A vertical cavity surface emitting laser (VCSEL) is described using a sub-wavelength grating (SWG) structure that has a very broad reflection spectrum and very high reflectivity. The grating comprises segments of high and low refractive index materials with an index differential between the high and low index materials. By way of example, a SWG reflective structure is disposed over a low index cavity region and above another reflective layer (either SWG or DBR). In one embodiment, the SWG structure is movable, such as according to MEMS techniques, in relation to the opposing reflector to provide wavelength selective tuning. The SWG-VCSEL design is scalable to form the optical cavities for a range of SWG-VCSELs at different wavelengths, and wavelength ranges.
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Chang-Hasnain Connie J.
Huang Michael Chung-Yi
Mateus Carlos Fernando Rondina
Zhou Ye
O'Banion John P.
Park Kinam
The Regents of the University of California
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