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Title: Phase conjugation in a high power regenerative laser amplifier system

Abstract

We discuss the design and performance of a master oscillator/regenerative power amplifier laser system using a stimulated Brillouin scattering phase conjugator to control beam aberrations within the amplifier cavity. The master oscillator is a self-seeded Q-switched ND:YLF laser which provides up to 40mJ of single frequency light in a 10ns to 15ns pulse for amplification. The power amplifier uses a regenerative ring design with approximately 10 total passes and a phase conjugate mirror after the 5th pass. The conjugator is necessary to help produce a plane wavefront and thus a uniform intensity distribution within the ring, a requirement to avoid damage at the high intensities. The energy at the phase conjugate mirror exceeds 1J/pulse and thus careful attention is paid to the tradeoff between input energy, conjugator reflectivity and nearfield spatial fidelity of the return. The laser output is in the range of 20J/pulse, 2GW peak with average power of 70 W. Measurements have been made at high power of the nearfield and farfield beam quality.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
DOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6604814
Alternate Identifier(s):
OSTI ID: 6604814; Legacy ID: DE93009309
Report Number(s):
UCRL-JC-105458; CONF-9108238--1
ON: DE93009309
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: International summer school on nonlinear optical phase conjugation, Prague (Czech Republic), 26-31 Aug 1991
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; NEODYMIUM LASERS; POWER AMPLIFIERS; PHASE STUDIES; BEAM OPTICS; BRILLOUIN EFFECT; COMPRESSION; OSCILLATORS; PHASE OSCILLATIONS; PULSES; X RADIATION; AMPLIFIERS; BEAM DYNAMICS; COHERENT SCATTERING; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; EQUIPMENT; IONIZING RADIATIONS; LASERS; OSCILLATIONS; RADIATIONS; SCATTERING; SOLID STATE LASERS 426002* -- Engineering-- Lasers & Masers-- (1990-)

Citation Formats

Hackel, L.A., Miller, J.L., and Dane, C.B. Phase conjugation in a high power regenerative laser amplifier system. United States: N. p., 1992. Web.
Hackel, L.A., Miller, J.L., & Dane, C.B. Phase conjugation in a high power regenerative laser amplifier system. United States.
Hackel, L.A., Miller, J.L., and Dane, C.B. Wed . "Phase conjugation in a high power regenerative laser amplifier system". United States.
@article{osti_6604814,
title = {Phase conjugation in a high power regenerative laser amplifier system},
author = {Hackel, L.A. and Miller, J.L. and Dane, C.B.},
abstractNote = {We discuss the design and performance of a master oscillator/regenerative power amplifier laser system using a stimulated Brillouin scattering phase conjugator to control beam aberrations within the amplifier cavity. The master oscillator is a self-seeded Q-switched ND:YLF laser which provides up to 40mJ of single frequency light in a 10ns to 15ns pulse for amplification. The power amplifier uses a regenerative ring design with approximately 10 total passes and a phase conjugate mirror after the 5th pass. The conjugator is necessary to help produce a plane wavefront and thus a uniform intensity distribution within the ring, a requirement to avoid damage at the high intensities. The energy at the phase conjugate mirror exceeds 1J/pulse and thus careful attention is paid to the tradeoff between input energy, conjugator reflectivity and nearfield spatial fidelity of the return. The laser output is in the range of 20J/pulse, 2GW peak with average power of 70 W. Measurements have been made at high power of the nearfield and farfield beam quality.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Conference:
Other availability
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