Coherent light generators – Particular beam control device – Nonlinear device
Patent
1988-11-29
1989-12-12
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Nonlinear device
372 34, 372 35, H01S 310
Patent
active
048872709
ABSTRACT:
A solid-state laser system for producing a frequency-doubled CW laser output beam having a stabilized output. The laser system includes within a three-mirror resonator cavity, a Nd: YAG laser rod operating at an output wavelength of 1.064 .mu.m in the TEMoo transverse mode, and a KTP frequency-doubling crystal. At one end of the laser cavity the beam is reflected from a folding mirror through the frequency-doubling crystal to another reflecting mirror which reflects both the fundamental wavelength of the output beam from the laser rod, and also the doubled frequency beam at a wavelength of 0.532 .mu.m back through the frequency-doubling crystal onto the folding reflector. The folding reflector is coated to reflect light at the longer wavelength but transmits substantially all of the light incident upon it at the 0.532 .mu.m wavelength. Cladding of the laser rod with Spinel or quartz and/or laminar flow cooling of the laser rod are utilized to maintain the temperature distribution over the surface of the laser rod subsantially constant so as to stabilize the output power level at the frequency-doubled wavelength.
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Eye Research Institute of Retina Foundation
Jr. Leon Scott
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