Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times
Abstract
We developed a linear theory of backward stimulated Brillouin scatter (BSBS) of a spatially and temporally random laser beam relevant for laser fusion. Our analysis reveals a new collective regime of BSBS (CBSBS). Its intensity threshold is controlled by diffraction, once cTc exceeds a laser speckle length, with Tc the laser coherence time. The BSBS spatial gain rate is approximately the sum of that due to CBSBS, and a part which is independent of diffraction and varies linearly with Tc. The CBSBS spatial gain rate may be reduced significantly by the temporal bandwidth of KrF-based laser systems compared to the bandwidth currently available to temporally smoothed glass-based laser systems.
- Authors:
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1421180
- Grant/Contract Number:
- SCOO02238
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Name: Physics of Plasmas Journal Volume: 22 Journal Issue: 1; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Korotkevich, Alexander O., Lushnikov, Pavel M., and Rose, Harvey A. Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times. United States: N. p., 2015.
Web. doi:10.1063/1.4906057.
Korotkevich, Alexander O., Lushnikov, Pavel M., & Rose, Harvey A. Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times. United States. https://doi.org/10.1063/1.4906057
Korotkevich, Alexander O., Lushnikov, Pavel M., and Rose, Harvey A. Tue .
"Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times". United States. https://doi.org/10.1063/1.4906057.
@article{osti_1421180,
title = {Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times},
author = {Korotkevich, Alexander O. and Lushnikov, Pavel M. and Rose, Harvey A.},
abstractNote = {We developed a linear theory of backward stimulated Brillouin scatter (BSBS) of a spatially and temporally random laser beam relevant for laser fusion. Our analysis reveals a new collective regime of BSBS (CBSBS). Its intensity threshold is controlled by diffraction, once cTc exceeds a laser speckle length, with Tc the laser coherence time. The BSBS spatial gain rate is approximately the sum of that due to CBSBS, and a part which is independent of diffraction and varies linearly with Tc. The CBSBS spatial gain rate may be reduced significantly by the temporal bandwidth of KrF-based laser systems compared to the bandwidth currently available to temporally smoothed glass-based laser systems.},
doi = {10.1063/1.4906057},
journal = {Physics of Plasmas},
number = 1,
volume = 22,
place = {United States},
year = {Tue Jan 20 00:00:00 EST 2015},
month = {Tue Jan 20 00:00:00 EST 2015}
}
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https://doi.org/10.1063/1.4906057
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