Enhanced beam quality of high-energy lasers utilizing fused silica as an all-solid-state SBS-PCM

IF 5 2区物理与天体物理 Q1 OPTICS Optics and Laser Technology Pub Date : 2024-09-26 DOI:10.1016/j.optlastec.2024.111850

Bin Chen , Zhenxu Bai , Yifu Chen , Yanyan Deng , Tianhao Ma , Kun Wang , Can Cui , Yaoyao Qi , Jie Ding , Bingzheng Yan , Yulei Wang , Zhiwei Lu

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Abstract

Beam quality is critical for laser applications in both scientific and industrial fields. Stimulated Brillouin scattering phase conjugate mirror (SBS-PCM) serves as an effective beam cleanup scheme due to its phase conjugation properties. In this work, a SBS-PCM using fused silica was constructed and employed in a double-pass amplifier setup. With an input energy of 75.2 mJ, the system achieved a maximum magnification of approximately 9 times, resulting in an output energy of 672 mJ. Comparative analysis with a high-reflection mirror revealed that the SBS-PCM effectively mitigated unfavorable diffraction patterns induced by the hard-edge aperture in the near-field pattern, improving the beam quality factor from 1.23 to 1.085 times the diffraction limit. Additionally, the coefficient of determination (R²) of the beam profile improved by 2.18 % compared to that of the high-reflection mirror. These results indicate that the free-space all-solid-state SBS-PCM can provide a promising approach to improving beam quality for high-power laser systems.

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利用熔融石英作为全固态 SBS-PCM 提高高能激光器的光束质量

光束质量对于科学和工业领域的激光应用至关重要。受激布里渊散射相位共轭镜（SBS-PCM）因其相位共轭特性而成为一种有效的光束净化方案。在这项工作中，利用熔融石英构建了一个 SBS-PCM，并将其应用于双通道放大器装置中。输入能量为 75.2 mJ，系统的最大放大倍数约为 9 倍，输出能量为 672 mJ。与高反射镜的对比分析表明，SBS-PCM 能有效减轻近场图案中硬边孔径引起的不利衍射图案，将光束质量因子从衍射极限的 1.23 倍提高到 1.085 倍。此外，与高反射镜相比，光束轮廓的确定系数 (R2) 提高了 2.18%。这些结果表明，自由空间全固态 SBS-PCM 是提高高功率激光系统光束质量的有效方法。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems