Transverse stimulated Raman scattering(TSRS)in potassium dihydrogen phosphate(KDP)and deuterated potassium dihydrogen phosphate(DKDP)plates for large-aperture,inertial confinement fusion(ICF)-class laser systems is a ...Transverse stimulated Raman scattering(TSRS)in potassium dihydrogen phosphate(KDP)and deuterated potassium dihydrogen phosphate(DKDP)plates for large-aperture,inertial confinement fusion(ICF)-class laser systems is a well-recognized limitation giving rise to parasitic energy conversion and laser-induced damage.The onset of TSRS is manifested in plates exposed to the ultraviolet section of the beam.TSRS amplification is a coherent process that grows exponentially and is distributed nonuniformly in the crystal and at the crystal surfaces.To understand the growth and spatial distribution of TSRS energy in various configurations,a modeling approach has been developed to simulate the operational conditions relevant to ICF-class laser systems.Specific aspects explored in this work include(i)the behavior of TSRS in large-aperture crystal plates suitable for third-harmonic generation and use as wave plates for polarization control in current-generation ICF-class laser system configurations;(ii)methods,and their limitations,of TSRS suppression and(iii)optimal geometries to guide future designs.展开更多
基金This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856,the University of Rochester and the New York State Energy Research and Development Authority。
文摘Transverse stimulated Raman scattering(TSRS)in potassium dihydrogen phosphate(KDP)and deuterated potassium dihydrogen phosphate(DKDP)plates for large-aperture,inertial confinement fusion(ICF)-class laser systems is a well-recognized limitation giving rise to parasitic energy conversion and laser-induced damage.The onset of TSRS is manifested in plates exposed to the ultraviolet section of the beam.TSRS amplification is a coherent process that grows exponentially and is distributed nonuniformly in the crystal and at the crystal surfaces.To understand the growth and spatial distribution of TSRS energy in various configurations,a modeling approach has been developed to simulate the operational conditions relevant to ICF-class laser systems.Specific aspects explored in this work include(i)the behavior of TSRS in large-aperture crystal plates suitable for third-harmonic generation and use as wave plates for polarization control in current-generation ICF-class laser system configurations;(ii)methods,and their limitations,of TSRS suppression and(iii)optimal geometries to guide future designs.
