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Title: Single laser pulse compression via strongly coupled stimulated Brillouin scattering in plasma

Abstract

Laser amplification in plasma, including stimulated Raman scattering amplification and strongly coupled stimulated Brillouin scattering (sc-SBS) amplification, is very promising to generate ultrahigh-power and ultrashort laser pulses. But both are quite complex in experiments: at least three different laser pulses must be prepared; temporal delay and spatial overlap of these three pulses are difficult. We propose a single pulse compression scheme based on sc-SBS in plasma. Only one moderately long laser is applied, the front part of which ionizes the gas to produced plasma, and gets reflected by a plasma mirror at the end of the gas channel. The reflected front quickly depletes the remaining part of the laser by sc-SBS in the self-similar regime. The output laser is much stronger and shorter. This scheme is at first considered theoretically, then validated by using 1D PIC simulations.

Authors:
; ;  [1];  [2];  [3]; ; ;  [1];  [2]
  1. Laser Fusion Research Center, China Academy of Engineering Physics, P.O. Box 919-988, Mianyang 621900 (China)
  2. (China)
  3. (CICIFSA), Shanghai Jiaotong University, Shanghai 200240 (China)
Publication Date:
OSTI Identifier:
22600005
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMPLIFICATION; BRILLOUIN EFFECT; COMPRESSION; COMPUTERIZED SIMULATION; IONS; LASERS; MIRRORS; PLASMA; PULSES; RAMAN EFFECT

Citation Formats

Peng, H., Wu, Z. H., Zhang, Z. M., Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900, Collaborative Innovation Center of IFSA, Zuo, Y. L., Zhou, K. N., Su, J. Q., E-mail: Sujingqin@caep.ac.cn, and Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900. Single laser pulse compression via strongly coupled stimulated Brillouin scattering in plasma. United States: N. p., 2016. Web. doi:10.1063/1.4959173.
Peng, H., Wu, Z. H., Zhang, Z. M., Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900, Collaborative Innovation Center of IFSA, Zuo, Y. L., Zhou, K. N., Su, J. Q., E-mail: Sujingqin@caep.ac.cn, & Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900. Single laser pulse compression via strongly coupled stimulated Brillouin scattering in plasma. United States. doi:10.1063/1.4959173.
Peng, H., Wu, Z. H., Zhang, Z. M., Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900, Collaborative Innovation Center of IFSA, Zuo, Y. L., Zhou, K. N., Su, J. Q., E-mail: Sujingqin@caep.ac.cn, and Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900. Fri . "Single laser pulse compression via strongly coupled stimulated Brillouin scattering in plasma". United States. doi:10.1063/1.4959173.
@article{osti_22600005,
title = {Single laser pulse compression via strongly coupled stimulated Brillouin scattering in plasma},
author = {Peng, H. and Wu, Z. H. and Zhang, Z. M. and Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900 and Collaborative Innovation Center of IFSA and Zuo, Y. L. and Zhou, K. N. and Su, J. Q., E-mail: Sujingqin@caep.ac.cn and Science and Technology on Plasma Physics Laboratory, P.O. Box 919-988, Mianyang 621900},
abstractNote = {Laser amplification in plasma, including stimulated Raman scattering amplification and strongly coupled stimulated Brillouin scattering (sc-SBS) amplification, is very promising to generate ultrahigh-power and ultrashort laser pulses. But both are quite complex in experiments: at least three different laser pulses must be prepared; temporal delay and spatial overlap of these three pulses are difficult. We propose a single pulse compression scheme based on sc-SBS in plasma. Only one moderately long laser is applied, the front part of which ionizes the gas to produced plasma, and gets reflected by a plasma mirror at the end of the gas channel. The reflected front quickly depletes the remaining part of the laser by sc-SBS in the self-similar regime. The output laser is much stronger and shorter. This scheme is at first considered theoretically, then validated by using 1D PIC simulations.},
doi = {10.1063/1.4959173},
journal = {Physics of Plasmas},
number = 7,
volume = 23,
place = {United States},
year = {Fri Jul 15 00:00:00 EDT 2016},
month = {Fri Jul 15 00:00:00 EDT 2016}
}
  • Plasma amplification of low energy, a short (∼100–500 fs) laser pulse by an energetic long (∼10 ps) pulse via strong coupling Stimulated Brillouin Backscattering is investigated with an extensive analysis of one-dimensional particle-in-cell simulations. Parameters relevant to nowadays experimental conditions are investigated. The obtained seed pulse spectra are analyzed as a function of the interaction conditions such as plasma profile, pulses delay, and seed or pulse duration. The factors affecting the amount of energy transferred are determined, and the competition between Brillouin-based amplification and parasitic Raman backscattering is analyzed, leading to the optimization of the interaction conditions.
  • Scattered light near the laser wavelength has been spectrally and temporally resolved in experiments in which a 1.06 [mu]m wavelength laser irradiates a low-[ital Z] target. At sufficiently high laser intensities, the backscattered spectrum broadens towards longer wavelengths (lower frequencies) by an amount which is several times an ion acoustic shift. The behavior of the spectra agrees well with the prediction of time-dependent, homogeneous theory.
  • Strongly coupled large-angle stimulated Raman scattering (LA SRS) of a short intense laser pulse develops in a plane plasma-filled capillary differently than in a plasma with open boundaries. Coupling the laser pulse to a capillary seeds the LA SRS in the forward direction (scattering angle smaller than {pi}/2) and can thus produce a high instability level in the vicinity of the entrance plane. In addition, oblique mirror reflections off capillary walls partly suppress the lateral convection of scattered radiation and increase the growth rate of the SRS under arbitrary (not too small) angle. Hence, the saturated convective gain falls withmore » an angle much slower than in an unbounded plasma and even for the near-forward SRS can be close to that of the direct backscatter. At a large distance, the LA SRS evolution in the interior of the capillary is dominated by quasi-one-dimensional leaky modes whose damping is related to the leakage of scattered radiation through the walls.« less
  • We examine the feasibility of strongly coupled stimulated Brillouin scattering as a mechanism for the plasma-based amplification of sub-picosecond pulses. In particular, we use fluid theory and particle-in-cell simulations to compare the relative advantages of Raman and Brillouin amplification over a broad range of achievable parameters.
  • Compton backscattered x-ray source is developed in the energy region of a few hundred keV at Kansai Photon Science Institute of Japan Atomic Energy Agency (KPSI-JAEA). A remarkable feature of the Compton backscattered x-ray source is that the generated x-ray beam is a well-collimated and has a definite polarization property. The Compton backscattered x-ray source at KPSI-JAEA consists of the 150-MeV electron beam with the pulse duration of 24 ps accelerated by Microtron accelerator and a Nd:YAG laser with the pulse duration of 23 ns. At the first trial of the X-ray generation, the x-ray flux is not enough formore » actual use. As an actual x-ray source, it is important to increase the generated x-ray flux as much as possible. Thus, in order to increase the x-ray flux, we develop the pulse compression system for the Nd:YAG laser through the stimulated Brillouin scattering (SBS). The SBS pulse compression is characterized by its high conversion efficiency and by its simplicity of construction. On this article, we describe the present status of the SBS pulse compression for the Compton backscattered x-ray source at KPSI-JAEA.« less