High-energy, high-beam-quality, dual-wavelength picosecond laser source for ultraremote spatial-target ranging

IF 2.5 3区物理与天体物理 Q2 OPTICS Optics Communications Pub Date : 2025-06-01 Epub Date: 2025-02-28 DOI:10.1016/j.optcom.2025.131659

Ning Xu , Wenqi Ge , Zhenao Bai , Xiaochao Yan , Yingtong Shi , Xida Han , Xianlin Wu , Xudong Lin , Ming Li

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Abstract

A high-energy, high-beam-quality, all-solid-state, dual-wavelength picosecond laser is designed for spatial-target ranging. This system features a fundamental-frequency laser with a bandwidth of 0.3 nm, a pulse energy of 310 mJ, a pulse duration of 70 ps, and a beam quality factor M² of ≤2 at a repetition rate of 100 Hz. The laser operates on a master oscillator power amplifier configuration, comprising the following: a neodymium-doped yttrium orthovanadate (Nd:YVO₄) mode-locked oscillator, a laser diode-end-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) regenerative amplifier, a pre-amplifier, and a single-stage, dual-pass, traveling-wave amplifier. High-efficiency second-harmonic generation at 532 nm is achieved via type-I phase matching with a LiB₃O₅ (LBO) crystal. A green laser with 208 mJ pulse energy is generated using a 1064 nm laser with 310 mJ input, achieving a maximum conversion efficiency of 67.1%. The system emits cochannel laser pulses both at 1064 and 532 nm, representing a promising light source for spatial-target ranging.

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用于超远空间目标测距的高能、高光束质量、双波长皮秒激光源

设计了一种用于空间目标测距的高能、高光束质量、全固态、双波长皮秒激光器。该系统的基频激光器带宽为0.3 nm，脉冲能量为310 mJ，脉冲持续时间为70 ps，在100 Hz的重复频率下，光束质量因子M2≤2。该激光器工作在一个主振荡器功率放大器配置上，包括：一个掺钕正钒酸钇（Nd:YVO4）锁模振荡器，一个激光二极管端泵浦掺钕钇铝石榴石（Nd:YAG）再生放大器，一个前置放大器和一个单级双通行波放大器。通过与li3o5 （LBO）晶体的i型相匹配，在532 nm处实现了高效率的二次谐波产生。采用1064 nm、输入310 mJ的激光器，产生脉冲能量为208 mJ的绿色激光，最大转换效率为67.1%。该系统发射1064 nm和532 nm的共通道激光脉冲，是一种很有前途的空间目标测距光源。

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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.