Coherent light generators – Particular beam control device – Nonlinear device
Reexamination Certificate
2006-05-31
2009-11-03
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular beam control device
Nonlinear device
C372S023000, C372S043010, C372S050100, C372S050110
Reexamination Certificate
active
07613215
ABSTRACT:
A vertical external cavity surface emitting laser (VECSEL) in which the full-width at half maximum (FWHM) of laser light is reduced by two etalon filter layers to improve the efficiency of second harmonic (SHG) crystal is provided. The VECSEL includes: a laser chip for generating laser light; a first etalon filter layer formed on the laser chip; a second etalon filter layer that is formed on the first etalon filter layer and has a different refractive index than the first etalon filter layer; a first mirror separated from and disposed obliquely to the laser chip; a second mirror for reflecting the laser light reflected from the first mirror back to the first mirror to form a cavity with the laser chip; and an SHG crystal disposed along an optical path between the first and second mirrors and doubles the frequency of the laser light generated in the laser chip.
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Cantor & Colburn LLP
Harvey Minsun
Niu Xnning
Samsung Electronics Co,. Ltd.
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