RMS error analysis of spatial uniformity and energy stability of the laser beam in second harmonic generation.

IF 3.2 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2024-07-29 DOI:10.1364/OE.529902
Geonhui Lee, Hanjin Jo, Seungjin Hwang, Sungyoon Lee, Tae Jun Yu
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引用次数: 0

Abstract

The coupling of the energy stability and spatial uniformity of the laser beam before and after second harmonic generation (SHG) was analyzed. SHG experiments were performed using a Nd:YAG nanosecond laser and LBO crystals, and images, pulse shapes, and energies were measured. The relationship between energy stability and spatial uniformity uses a formula derived from the previous study to analyze changes in energy stability and spatial uniformity of the input beam and converted beam. In addition, the measured input beam shape and energy are compared with the results of applying the SHG converting equation considering pump depletion. Both methods were similar to the experimental results when corrected by empirical factors. Through SHG, it was confirmed that there is an optimal point of energy stability and spatial uniformity of the laser beam near the critical power.

二次谐波发生中激光束空间均匀性和能量稳定性的均方根误差分析。
分析了二次谐波发生(SHG)前后激光束能量稳定性和空间均匀性的耦合。使用 Nd:YAG 纳秒激光器和 LBO 晶体进行了 SHG 实验,并测量了图像、脉冲形状和能量。能量稳定性和空间均匀性之间的关系使用了之前研究得出的公式,分析了输入光束和转换光束的能量稳定性和空间均匀性的变化。此外,还将测量到的输入光束形状和能量与考虑到泵耗的 SHG 转换方程的应用结果进行了比较。经经验因素修正后,这两种方法与实验结果相似。通过 SHG,证实在临界功率附近存在一个激光束能量稳定性和空间均匀性的最佳点。
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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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