Coherent light generators – Particular beam control device – Having particular beam control circuit component
Patent
1992-07-29
1993-10-19
Bovernick, Rodney B.
Coherent light generators
Particular beam control device
Having particular beam control circuit component
372 99, 372108, H01S 313
Patent
active
052552756
ABSTRACT:
A solid state laser provided with a solid state laser medium, a laser-medium pumping unit for performing an optical-pumping of the solid state laser medium, an optical reflection unit having a pair of a total reflection member for performing a total reflection of oscillating laser light and an output member for transmitting and outputting a part of the oscillating laser light, a reflection surface of which is coated with a reflection film having a Gaussian-type reflectivity distribution in the direction perpendicular to an optical axis of the solid state laser medium. In this solid state laser, the radius of curvature of the reflection surface of the output member, is established in such a manner that laser oscillation is efficiently performed between the total reflection member and the output member. Moreover, the radius of curvature of an output surface of the output member is established in such a way that rays of resonance light, which are incident through the solid state laser medium thereon when laser oscillation is effected, become parallel rays. Incidentally, the resonance light includes converging light and diverging light. Thus laser oscillation can be efficiently effected. Further, even when solid state laser medium causes a thermal lensing effect, laser output light with large output power and high-quality can be surely obtained as parallel rays.
REFERENCES:
patent: 4553244 (1985-11-01), Benedict et al.
patent: 4872181 (1989-10-01), Johnson et al.
patent: 4955725 (1990-09-01), Johnson et al.
Bovernick Rodney B.
Hoya Corporation
Wise Robert E.
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