Coherent light generators – Particular beam control device – Mode discrimination
Reexamination Certificate
2005-05-13
2008-08-26
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular beam control device
Mode discrimination
C372S028000, C372S046013, C372S046015, C372S096000
Reexamination Certificate
active
07418014
ABSTRACT:
A surface-emitting type semiconductor laser includes a substrate, a first distributed Bragg reflection type mirror formed above the substrate, an active layer formed above the first mirror, a second distributed Bragg reflection type mirror formed above the active layer, and an insulation layer having an opening section that is formed in one of the first and second mirrors, wherein light generated from the active layer is emitted as a lower order mode laser beam lower order modeor a higher order mode laser beamhigher order mode, and the first mirror is formed with a number of pairs greater than the number of pairs of the second mirror such that the lower order mode laser beamlower order mode can be emitted in an upward direction of the substrate, and the opening section in the insulation layer is formed to have a size that enables the higher order mode laser beamhigher order mode to be emitted in a downward direction of the substrate.
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Harness & Dickey & Pierce P.L.C.
Harvey Minsun
Seiko Epson Corporation
Zhang Yuanda
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