Research on a compact solid-state electro-optical Q-switched air-cooled near-fundamental mode laser
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摘要:
为了获得一种可在测距、目标指示等场景下使用的激光器，采用光线传输矩阵仿真分析了望远镜腔，用热阻计算分析了体内传热过程和表面散热过程，进行了理论分析和实验验证。获得了一种可在40 ℃环境温度中运行的风冷近基模小型固体电光调Q激光器，并取得了重复频率10 Hz、单脉冲能量100 mJ、光束质量因子M2=1.31、脉宽10 ns、发散角0.6 mrad的1064 nm激光输出。结果表明, 该激光器适合在测距、目标指示等要求激光器具有高单脉冲能量、高峰值功率、高光束质量等特点的场景下使用。这一结果对激光测距、激光指示等应用方面的发展有一定帮助。
Abstract:To achieve a laser capable of functioning in applications such as distance measurement and target designation, two methodologies were primarily utilized: The simulation analysis of the ray transfer matrix for the telescope cavity and the theoretical calculation of steady-state thermal resistance to analyze both the internal heat transfer and surface heat dissipation processes. Through rigorous theoretical examination and empirical validation, a compact solid-state electro-optical Q-switched air-cooled near-fundamental mode laser capable of operating at an ambient temperature of 40 ℃ was successfully developed. Output laser at 1064 nm was characterized by a repetition rate of 10 Hz, a single pulse energy of 100 mJ, a beam quality factor M2 of 1.31, a pulse duration of 10 ns, and a divergence angle of 0.6 mrad. The findings demonstrate that this laser is optimally suited for applications that demand lasers with high single-pulse energy, peak power, and exceptional beam quality, such as in laser ranging and targeting. This advancement holds significant implications for the evolution of laser-based distance measurement and target indication technologies.
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图 2 望远镜腔基模光斑半径随腔内位置的变化
Figure 2. Radius of the spot in the fundamental mode of telescope cavity vs. position in the cavity
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图 4 望远镜腔电光调Q激光器实验光路图
Figure 4. Diagram of the experimental optical path of the electro-optical Q-switched laser in the telescope cavity
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