High-repetition-rate, high-pulse-energy, and high-beam-quality laser system using an ultraclean closed-type SBS-PCM | Zendy

Zhijun Kang | Zendy; Zhongwei Fan | Zendy; Yutao Huang | Zendy; Hongbo Zhang | Zendy; Wenqi Ge | Zendy; Mingshan Li | Zendy; Xiaochao Yan | Zendy; Guoxin Zhang | Zendy

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High-repetition-rate, high-pulse-energy, and high-beam-quality laser system using an ultraclean closed-type SBS-PCM

Author(s) -

Zhijun Kang,

Zhongwei Fan,

Yutao Huang,

Hongbo Zhang,

Wenqi Ge,

Mingshan Li,

Xiaochao Yan,

Guoxin Zhang

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.006560

Subject(s) - optics , materials science , brillouin scattering , laser beam quality , laser , beam (structure) , pulse (music) , optoelectronics , laser beams , physics , detector

We present a high-repetition-rate, high-pulse-energy, high-beam-quality, and high-average-power laser system using an ultraclean closed-type stimulated-Brillouin-scattering phase-conjugate mirror (SBS-PCM). By controlling microparticles of SBS-PCM down to 40 nm, thermal load capacity of such closed-type SBS-PCM was greatly improved, which presented the best reported cleanliness. The closed-type SBS-PCM, lacking scanning wedge plates, achieved reflectivity as high as 92% and showed no optical breakdown phenomena or obvious thermal effects at a 500 Hz pulse-repetition frequency (PRF). Operation at 550 W output power, approximately 1.1 J pulse energy, and beam quality M 2 of approximately 2 represents, to our knowledge, the best reported performance. Thermal phase distortion was compensated, and the maximum-output-power pulse-width compression improved from 30 ns to approximately 10 ns.

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