Global to push GA events into
skip to main content

Title: Long-pulse-width narrow-bandwidth solid state laser

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.
Inventors:
 [1];  [1]
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
871239
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5689363
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
long-pulse-width; narrow-bandwidth; solid; laser; pulse; emits; 500-1000; quasi-rectangular; pulses; 527; nm; near; diffraction-limited; divergence; transform-limited; bandwidth; consists; flashlamp-pumped; glass; zig-zag; amplifiers; threshold; stimulated-brillouin-scattering; sbs; phase; conjugator; free-running; single; frequency; ylf; master; oscillator; completely; passive; polarization; switching; provides; eight; amplifier; passes; multiple; output; generated; cells; pressures; gaseous; medium; materials; multi-frequency; ideally; suited; illuminator; range; speckle; imaging; applications; average; power; beam; quality; application; process; benefit; format; including; material; processing; medical; beam quality; material processing; frequency output; output laser; medical applications; average power; master oscillator; single frequency; multiple frequency; speckle imaging; limited bandwidth; completely passive; phase conjugator; imaging applications; ideally suited; near diffraction; pulse laser; pulse format; /359/372/