Vertical external cavity surface emitting laser with pump...

Details Vertical external cavity surface emitting laser with pump... Vertical external cavity surface emitting laser with pump...

2006-06-08

2010-12-21

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S022000, C372S036000, C372S050110

Reexamination Certificate

active

07856043

ABSTRACT:
A vertical external cavity surface emitting laser (VECSEL) using end pumping in which a pumping beam is recycled using a pumping beam reflection layer to increase pumping beam absorption is provided. The VECSEL includes: an active layer for generating and emitting signal light; an external mirror that is separated from and faces a top surface of the active layer and transmits a first portion of the signal light and reflects a second portion of the signal light to the active layer; a first reflection layer contacting a lower surface of the active layer and reflecting the signal light to the external mirror; a pump laser for emitting the pumping beam toward the lower surface of the active layer to excite the active layer; and a second reflection layer contacting the top surface of the active layer and reflecting a portion of the pumping beam back to the active layer.

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patent: 2002/0080836 (2002-06-01), Hwang

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