~ 350 W near-diffraction-limited Nd: YVO4 laser amplifier with thermal spherical aberration self-compensation

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-05-21 DOI:10.1007/s00340-025-08480-5

Yang Liu, Xiaoyan Qiu, Bin Liu, Yuhong Shen, Liying Chen, Junyang Dong, Yiwen Jin, Yichao Peng, Jian Chen, Bingfeng Ju, Chong Liu

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Abstract

This study proposes a high-power, high-beam-quality 1064 nm Nd: YVO₄ laser amplifier that employs self-compensating spherical aberration, based on 878 nm and 888 nm laser diode end-pumping. Thermal compensation of spherical aberration in the laser crystal is confirmed through wavefront measurement, and the impact of thermal distortion on beam quality is evaluated. The seed laser with an output power of 30 W is amplified to 385 W by employing a four-stage Nd: YVO₄ amplifier. During amplification, the laser beam quality undergoes deterioration and compensation. When the output power decreased to ~ 350 W, the final beam quality factors are 1.21 in the horizontal direction and 1.25 in the vertical direction. The high average output power and near diffraction-limited laser beam demonstrate the potential applications of conventional bulk Nd: YVO₄ crystals in high average power and high brightness laser sources.

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~ 350w近衍射受限Nd: YVO4激光放大器，热球差自补偿

提出了一种基于878 nm和888 nm激光二极管端泵浦的高功率、高光束质量的1064 nm Nd: YVO4激光放大器。通过波前测量证实了激光晶体中球差的热补偿，并评估了热畸变对光束质量的影响。采用四级Nd: YVO4放大器将输出功率为30 W的种子激光器放大至385 W。在放大过程中，激光束质量会发生衰减和补偿。当输出功率降至~ 350w时，最终光束质量因子在水平方向为1.21，在垂直方向为1.25。高平均输出功率和近衍射限制的激光束显示了传统块体Nd: YVO4晶体在高平均功率和高亮度激光源中的潜在应用。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.