X-切向Yb:YLuGdCOB晶体的声光调Q脉冲激光性质
Properties of Acousto-Optic Q-Switched Pulsed Laser of X-Cut Yb:YLuGdCOB Crystal
摘要: 声光调Q是固体激光器实现脉冲运转、获得mJ量级脉冲能量的最常用方法，声光调Q能够严格控制脉冲激光的重复率。掺Yb稀土钙氧硼酸盐晶体为低增益激光介质，受激发射截面很小，晶体的能量储存能力强，适合声光调Q脉冲激光的运转。我们在937 nm半导体激光器纵向泵浦条件下，利用平凹谐振腔，对掺Yb稀土钙氧硼酸盐X-切向Yb:YLuGdCOB晶体的声光调Q脉冲激光特性做了深入的研究。在最佳谐振腔输出透过率为T = 50%条件下，实现了重复率1~20 kHz范围内稳定的声光调Q脉冲运转。PRF = 1 kHz的重复率时，声光调Q产生的最大脉冲能量可达1 mJ，所产生的最大峰值功率超过166.00 kW，激光斜率效率为26.6%，最短脉冲宽度为6.0 ns。
Abstract: Acousto-optic Q-switching is the most common method for solid-state lasers to realize pulse operation and obtain mJ pulse energy. Acousto-optic Q-switching can strictly control the repetition rate of pulsed laser. Yb doped rare earth calcium oxyborate crystal is a low gain laser medium with small stimulated emission cross section and strong energy storage capacity. It is suitable for the operation of acousto-optic Q-switched pulse laser. Under the longitudinal pumping condition of 937 nm semiconductor laser, the characteristics of acousto-optic Q-switched pulsed laser in Yb doped rare earth calcium oxyborate X-cut Yb:YLuGdCOB crystal are studied by using a flat concave resonator. Under the condition that the optimal output transmittance of the resonator T = 50%, a stable acousto-optic Q-switched pulse operation in the repetition rate range of 1~20 kHz is realized. When PRF = 1 kHz, the maximum pulse energy generated by acousto-optic Q-switching can reach 1 mJ, the maximum peak power generated exceeds 166.00 kW, the laser slope efficiency is 26.6%, and the shortest pulse width is 6.0 ns.
文章引用：刘芬芬, 刘存海. X-切向Yb:YLuGdCOB晶体的声光调Q脉冲激光性质[J]. 材料科学, 2021, 11(9): 959-966. https://doi.org/10.12677/MS.2021.119111

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