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Title: High-energy sub-phonon lifetime pulse compression by stimulated Brillouin scattering in liquids

Multi-Joule level stimulated Brillouin scattering (SBS) pulse compression below the acoustic phonon lifetime is demonstrated with a energy-scalable generator-amplifier setup. Single-pass compression of pulses longer than 20τ BB as phonon lifetime) to as short as 0.5τ B with ~100 mJ pulse energy is realized from the generator, by choosing the focusing length to match approximately with the full length at half maximum of the input Gaussian pulses. The interaction length is identified, both experimentally and numerically, as the key parameter in achieving sub-phonon lifetime pulse compression, with its main mechanism being the steepening of the Stokes pulse trailing edge via energy exchange process. After combining the generator with an amplifier that involves only collimated beams and serves as energy booster, the compression of 9 ns, 2 J pulses at 532 nm into 170 ps, 1.3 J per pulse is achieved in water, with very good stability in both pulse energy and duration. Furthermore, this work demonstrates for the first time the efficient high-energy SBS sub-phonon lifetime pulse compression, and paves a way to the reliable generation of sub-200 ps laser pulses with Joule-level energy.
Authors:
 [1] ;  [2] ;  [2]
  1. Univ. of New Mexico, Albuquerque, NM (United States). Center for High Technology Materials (CHTM); Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
  2. Univ. of New Mexico, Albuquerque, NM (United States). Center for High Technology Materials (CHTM)
Publication Date:
Grant/Contract Number:
SC0011446
Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 25; Journal Issue: 11; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Southwest Sciences, Santa Fe, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; lasers; nonlinear optics; scattering; stimulated Brillouin; pulse compression
OSTI Identifier:
1463706

Feng, Chengyong, Xu, Xiaozhen, and Diels, Jean -Claude. High-energy sub-phonon lifetime pulse compression by stimulated Brillouin scattering in liquids. United States: N. p., Web. doi:10.1364/OE.25.012421.
Feng, Chengyong, Xu, Xiaozhen, & Diels, Jean -Claude. High-energy sub-phonon lifetime pulse compression by stimulated Brillouin scattering in liquids. United States. doi:10.1364/OE.25.012421.
Feng, Chengyong, Xu, Xiaozhen, and Diels, Jean -Claude. 2017. "High-energy sub-phonon lifetime pulse compression by stimulated Brillouin scattering in liquids". United States. doi:10.1364/OE.25.012421. https://www.osti.gov/servlets/purl/1463706.
@article{osti_1463706,
title = {High-energy sub-phonon lifetime pulse compression by stimulated Brillouin scattering in liquids},
author = {Feng, Chengyong and Xu, Xiaozhen and Diels, Jean -Claude},
abstractNote = {Multi-Joule level stimulated Brillouin scattering (SBS) pulse compression below the acoustic phonon lifetime is demonstrated with a energy-scalable generator-amplifier setup. Single-pass compression of pulses longer than 20τB (τB as phonon lifetime) to as short as 0.5τB with ~100 mJ pulse energy is realized from the generator, by choosing the focusing length to match approximately with the full length at half maximum of the input Gaussian pulses. The interaction length is identified, both experimentally and numerically, as the key parameter in achieving sub-phonon lifetime pulse compression, with its main mechanism being the steepening of the Stokes pulse trailing edge via energy exchange process. After combining the generator with an amplifier that involves only collimated beams and serves as energy booster, the compression of 9 ns, 2 J pulses at 532 nm into 170 ps, 1.3 J per pulse is achieved in water, with very good stability in both pulse energy and duration. Furthermore, this work demonstrates for the first time the efficient high-energy SBS sub-phonon lifetime pulse compression, and paves a way to the reliable generation of sub-200 ps laser pulses with Joule-level energy.},
doi = {10.1364/OE.25.012421},
journal = {Optics Express},
number = 11,
volume = 25,
place = {United States},
year = {2017},
month = {5}
}