Fast time-evolving random polarization beam smoothing for laser-driven inertial confinement fusion

We propose a random polarization smoothing method for low-coherence laser to obtain focal spot with random polarization that evolves rapidly in sub-picosecond timescales. Random polarization smoothing is realized by a half-aperture wave plate with sufficient thickness. The degree of polarization and...

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Veröffentlicht in:Optics express 2022-06, Vol.30 (12), p.21906-21917
Hauptverfasser: Li, Fujian, Ji, Lailin, Zhao, Xiaohui, Xia, Lan, Liu, Dong, Shi, Haitao, Feng, Wei, Rao, Daxing, Cui, Yong, He, Ruijing, Xie, Qingnan, Li, Xiaoli, Ma, Weixin, Sui, Zhan, Gao, Yanqi
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container_end_page 21917
container_issue 12
container_start_page 21906
container_title Optics express
container_volume 30
creator Li, Fujian
Ji, Lailin
Zhao, Xiaohui
Xia, Lan
Liu, Dong
Shi, Haitao
Feng, Wei
Rao, Daxing
Cui, Yong
He, Ruijing
Xie, Qingnan
Li, Xiaoli
Ma, Weixin
Sui, Zhan
Gao, Yanqi
description We propose a random polarization smoothing method for low-coherence laser to obtain focal spot with random polarization that evolves rapidly in sub-picosecond timescales. Random polarization smoothing is realized by a half-aperture wave plate with sufficient thickness. The degree of polarization and polarization evolution of the focal spot are studied theoretically. The calculation results show that random polarization smoothing can make the polarization of focal spot evolve rapidly and randomly in time and space. Experimentally, the polarization of the focal spot of low-coherence laser with random polarization smoothing is measured by a single-shot polarimeter. The measurement results show that the degree of polarization of the focal spot is reduced to 0.22 on average, which proves the effectiveness of random polarization smoothing. The random polarization smoothing technique on low-coherence laser is expected to reduce the laser plasmas instability through its multi-dimensional random evolution properties.
doi_str_mv 10.1364/OE.458705
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title Fast time-evolving random polarization beam smoothing for laser-driven inertial confinement fusion
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