Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2004-10-28
2009-02-10
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S046010
Reexamination Certificate
active
07489717
ABSTRACT:
A surface-emitting semiconductor laser (VCSEL) having a structure in which the single horizontal mode of high power is stably maintained, and an optical device including a light-source device having this surface-emitting semiconductor laser are provided. A scattering-loss-structure portion composed of a low refractive-index region is disposed around a main current path in a surface-emitting semiconductor laser, namely around a cavity structure portion; the low refractive-index region is disposed at intervals; and the shape of the tip portion opposing to the center portion is set to be a tapered shape, for example, at an acute angle. Accordingly, in the cavity structure portion, the loss of light-emitting laser of a high-order mode localized in the outer circumferential portion becomes large, so that a surface-emitting semiconductor laser that oscillates the single-mode laser with favorable performance is constructed.
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Baba Toshihiko
Furukawa Akio
Hoshi Mitsunari
Matsuzono Atsushi
Sasaki Satoshi
Bell Boyd & Lloyd LLP
Harvey Minsun
Sony Corporation
Stafford Patrick
Toshihiko Baba
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