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

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.

Inventors:
 [1];  [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
OSTI Identifier:
871239
Patent Number(s):
5689363
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
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/

Citation Formats

Dane, C Brent, and Hackel, Lloyd A. Long-pulse-width narrow-bandwidth solid state laser. United States: N. p., 1997. Web.
Dane, C Brent, & Hackel, Lloyd A. Long-pulse-width narrow-bandwidth solid state laser. United States.
Dane, C Brent, and Hackel, Lloyd A. Wed . "Long-pulse-width narrow-bandwidth solid state laser". United States. https://www.osti.gov/servlets/purl/871239.
@article{osti_871239,
title = {Long-pulse-width narrow-bandwidth solid state laser},
author = {Dane, C Brent and Hackel, Lloyd A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

Works referenced in this record:

Phase Conjugation in a high Power Regenerative Laser Amplifier System
journal, January 1993


Design and operation of a 150 W near diffraction-limited laser amplifier with SBS wavefront correction
journal, January 1995


L'obésité de l'enfant013
journal, June 1990