Using polarization control plate to suppress transverse stimulated Raman scattering in large-aperture KDP crystal

AbstractTransverse stimulated Raman scattering (TSRS) is strongly generated in the third-harmonic-generation crystal potassium dihydrogen phosphate (KDP) and can even damage the KDP crystal in inertial confinement fusion drivers. In this work, a method to suppress TSRS is proposed in which the polarization control plate (PCP) is moved to a new position in the existing optical path. The proposed method can suppress TSRS significantly and doubles the laser threshold intensity in KDP crystal when the order of the PCP is 16. This result is attributed to the reduction of the gain length for the Stokes radiation. The proposed method may also be used to suppress other nonlinear effects, including transverse stimulated Brillouin scattering in large-aperture optical components.

Download Full-text

Suppression of transverse stimulated Raman scattering in large-aperture potassium dihydrogen phosphate crystals by pulse stacking

Laser and Particle Beams ◽

10.1017/s0263034619000053 ◽

2019 ◽

Vol 37 (01) ◽

pp. 1-4

Author(s):

Xinmin Fan ◽

Sensen Li ◽

Jianxin Zhang ◽

Xiaodong Huang ◽

Chunyan Wang ◽

...

Keyword(s):

Raman Scattering ◽

Stimulated Raman Scattering ◽

Technical Problem ◽

Potassium Dihydrogen Phosphate ◽

Dihydrogen Phosphate ◽

Kdp Crystal ◽

Potassium Dihydrogen ◽

Suppression Effect ◽

Large Aperture ◽

Stimulated Raman

AbstractEffective suppression of transverse stimulated Raman scattering (TSRS) in a large-aperture potassium dihydrogen phosphate (KDP) crystal is an important scientific and technical problem in high-intensity laser research and applications. In this work, a method to suppress TSRS using pulse stacking is proposed. The method suppresses TSRS significantly, with greater numbers of subpulses producing more obvious suppression effects, and the threshold intensity growth rate of the 3ω laser in the KDP crystal reaches up to about 1.9 when the stacked pulse contains four subpulses. This suppression effect is attributed to the fact that the polarization directions of adjacent subpulses are perpendicular to each other. The method can be used to suppress other nonlinear effects, including transverse stimulated Brillouin scattering in large-aperture optical devices and stimulated rotational Raman scattering in long air paths.

Download Full-text

Evaluating the safe limit of large-aperture potassium dihydrogen phosphate crystals associated with transverse stimulated Raman scattering

Applied Optics ◽

10.1364/ao.54.004167 ◽

2015 ◽

Vol 54 (13) ◽

pp. 4167 ◽

Cited By ~ 7

Author(s):

Wei Han ◽

Yong Xiang ◽

Fuquan Li ◽

Fang Wang ◽

Lidan Zhou ◽

...

Keyword(s):

Raman Scattering ◽

Stimulated Raman Scattering ◽

Potassium Dihydrogen Phosphate ◽

Dihydrogen Phosphate ◽

Potassium Dihydrogen ◽

Large Aperture ◽

Safe Limit ◽

Stimulated Raman

Download Full-text

Controlling stimulated Raman scattering by two-color light in inertial confinement fusion

Physics of Plasmas ◽

10.1063/1.4995474 ◽

2017 ◽

Vol 24 (8) ◽

pp. 082704 ◽

Cited By ~ 3

Author(s):

Z. J. Liu ◽

Y. H. Chen ◽

C. Y. Zheng ◽

L. H. Cao ◽

B. Li ◽

...

Keyword(s):

Raman Scattering ◽

Inertial Confinement Fusion ◽

Stimulated Raman Scattering ◽

Inertial Confinement ◽

Confinement Fusion ◽

Stimulated Raman

Download Full-text

Minimizing risk for laser damage due to transverse stimulated raman scattering in large-aperture KDP/DKDP plates for polarization control at 3w

10.1117/12.2598783 ◽

2021 ◽

Author(s):

Tanya Z. Kosc ◽

Terrence J. Kessler ◽

Hu Huang ◽

Stavros G. Demos

Keyword(s):

Raman Scattering ◽

Stimulated Raman Scattering ◽

Laser Damage ◽

Polarization Control ◽

Large Aperture ◽

Stimulated Raman

Download Full-text

Reducing reflectivity of stimulated Raman scattering by discretely changing phase of incident light in inertial fusion plasmas

Physica Scripta ◽

10.1088/1402-4896/ac3ef7 ◽

2021 ◽

Author(s):

Tian Yang ◽

Shutong Zhang ◽

yuanzhi Zhou ◽

Deji Liu ◽

Xueming Li ◽

...

Keyword(s):

Raman Scattering ◽

Inertial Confinement Fusion ◽

Stimulated Raman Scattering ◽

Brillouin Scattering ◽

Incident Light ◽

Inertial Confinement ◽

Fusion Plasmas ◽

Confinement Fusion ◽

Coupling Equations ◽

Stimulated Raman

Abstract A new method to reduce the stimulated Raman scattering (SRS) in inertial confinement fusion conditions is proposed by changing the incident light phase discretely. The proposal is first examined by three-wave coupling equations and then verified by Vlasov simulations. A remarkable decreasing in SRS reflectivity is observed when the period of phase changing is less than 2π/γ, where γ is the growth rate of SRS. By contrast, some simulations with continuously changing phase of incident light are carried out to compare their influence on SRS. In addition, the proposal may suppress the stimulated Brillouin scattering.

Download Full-text