峰值功率954 nm氢拉曼激光器小型化研究

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-03 DOI:10.1016/j.optcom.2025.132414

Zhensong Liu , Yuhui Liu , Yuxi Jia , Ming Xu , Jinglu Sun , Tao Li , Xianglong Cai , Suya Song , Qingwei Li , Jingwei Guo

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引用次数: 0

摘要

本研究提出了一种使用贝塞尔光束抽运方案的紧凑、峰值功率954纳米氢拉曼激光器。利用轴突产生非绕射光束，可有效抑制激光诱导击穿（LIB）。种子注入策略进一步降低了第二代Stokes （S2）产生阈值，提高了光子转换效率。系统最大S2脉冲能量为62.4 mJ@208 mJ泵浦能量，PCE为53.9%；PCE最高达到60.3%，是目前报道的532 nm抽运S2气体拉曼激光器在自由空间中性能最好的激光器。值得注意的是，拉曼电池长度显著缩短至0.9 m，凸显了小型化的潜力。然而，由于种子光来自四波混频（FWM）和贝塞尔光束侧叶的多重横向模式，在高泵浦能量下，特别是注入种子时，观察到光束质量下降。

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Miniaturization of high peak power 954-nm hydrogen Raman laser

This study presents a compact, high-peak-power 954-nm hydrogen Raman laser using a Bessel beam pumping scheme. By employing an axicon to generate a non-diffracting beam with extended focal depth, laser-induced breakdown (LIB) was effectively suppressed. A seed injection strategy further reduced the second Stokes (S2) generation threshold and enhanced photon conversion efficiency (PCE). The system achieved a maximum S2 pulse energy of 62.4 mJ@208 mJ pump energy with a PCE of 53.9 %; while the highest PCE reached 60.3 %, representing the best-reported performance for 532 nm pumped S2 gaseous Raman lasers in free space. Notably, the Raman cell length was significantly reduced to 0.9 m, highlighting the potential for miniaturization. However, beam quality degradation was observed at high pump energies, particularly with seed injection, attributed to the seed light from four-wave mixing (FWM) and the multiple transverse modes from the Bessel beam side lobes.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.