Optical: systems and elements – Optical amplifier – Raman or brillouin process
Patent
1995-06-12
1997-11-18
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Raman or brillouin process
359338, 359346, 372 21, 372 93, H01S 310, H01S 3098, H01S 308, H01S 323
Patent
active
056893639
ABSTRACT:
A long pulse laser system emits 500-1000 ns quasi-rectangular pulses at 527 nm with near diffraction-limited divergence and near transform-limited bandwidth. The system consists of one or more flashlamp-pumped Nd:glass zig-zag amplifiers, a very low threshold stimulated-Brillouin-scattering (SBS) phase conjugator system, and a free-running single frequency Nd:YLF master oscillator. Completely passive polarization switching provides eight amplifier gain passes. Multiple frequency output can be generated by using SBS cells having different pressures of a gaseous SBS medium or different SBS materials. This long pulse, low divergence, narrow-bandwidth, multi-frequency output laser system is ideally suited for use as an illuminator for long range speckle imaging applications. Because of its high average power and high beam quality, this system has application in any process which would benefit from a long pulse format, including material processing and medical applications.
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Dane C. Brent
Hackel Lloyd A.
Moskowitz Nelson
Sartorio Henry P.
The Regents of the University of California
Wooldridge John P.
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