Compact and highly efficient laser pump cavity

Details Compact and highly efficient laser pump cavity Compact and highly efficient laser pump cavity

1997-03-31

1999-11-02

Lee, John D.

Coherent light generators

Particular pumping means

Pumping with optical or radiant energy

372 70, H01S 3091

Patent

active

059784075

ABSTRACT:
A new, compact, side-pumped laser pump cavity design which uses non-conventional optics for injection of laser-diode light into a laser pump chamber includes a plurality of elongated light concentration channels. In one embodiment, the light concentration channels are compound parabolic concentrators (CPC) which have very small exit apertures so that light will not escape from the pumping chamber and will be multiply reflected through the laser rod. This new design effectively traps the pump radiation inside the pump chamber that encloses the laser rod. It enables more uniform laser pumping and highly effective recycle of pump radiation, leading to significantly improved laser performance. This new design also effectively widens the acceptable radiation wavelength of the diodes, resulting in a more reliable laser performance with lower cost.

REFERENCES:
patent: 3668546 (1972-06-01), Schumacher
patent: 4140979 (1979-02-01), Ramer
patent: 4357704 (1982-11-01), Koechner
patent: 4924474 (1990-05-01), Yagi et al.
patent: 5033058 (1991-07-01), Cabaret et al.
"High-power high-efficient diode-side-pumped Nd: YAG laser," Advanced Solid State Lasers, Ed. Pollock et al., OSA Trends in Optics and Photonics Series, vol. 10, Jan. 27-29, meeting, Optical Society of America, Washington, D.C. pp. 296-299 (Jan. 1997).

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