Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times

Korotkevich, Alexander O.; Lushnikov, Pavel M.; Rose, Harvey A.

doi:10.1063/1.4906057

Title: Beyond the random phase approximation: Stimulated Brillouin backscatter for finite laser coherence times

Journal Article · Tue Jan 20 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4906057· OSTI ID:1421180

Korotkevich, Alexander O.; Lushnikov, Pavel M.; Rose, Harvey A.

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.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: SCOO02238

OSTI ID:: 1421180

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Vol. 22 Journal Issue: 1; ISSN 1070-664X

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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References (22)

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