A high-power, narrow-band, mode-locked sodium D 2a laser with a high sum-frequency efficiency is demonstrated by mixing actively mode-locked Nd:YAG 1064 and 1319 nm lasers in two LiB 3 O 5 (LBO) crystals. The mode-locked lasers at 1064 nm (23.02 W output) and 1319 nm (17.98 W output) are generated from two diode, side-pumped, Nd:YAG, master oscillator power amplifier laser systems. A macro-micro pulse sodium beacon laser with a 30.2 W output power, 0.3 GHz (0.3 pm) linewidth, and a beam quality given by M 2 = 1.23 is obtained with a conversion efficiency of 73.6%. Compared with a single LBO crystal, the sum-frequency efficiency is enhanced by 14.5%. A laser coupled amplitude equation model, including the acousto-optic mode-locker, is applied for theoretical and numerical analyses of the sum-frequency conversion efficiency. The experimental results agree well with the theoretical calculations.

中文翻译：

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二级和频产生大功率窄带锁模钠激光器

通过将主动锁模Nd：YAG 1064和1319 nm激光主动混合在两个LiB 3 O 5（LBO）晶体中，可以证明具有高总频率效率的高功率，窄带，锁模钠D 2a激光器。由两个侧泵浦的Nd：YAG二极管主振荡器功率放大器激光器系统产生1064 nm（输出23.02 W）和1319 nm（输出17.98 W）的锁模激光器。获得具有30.2 W输出功率，0.3 GHz（0.3 pm）线宽和M 2 = 1.23给出的光束质量的宏微脉冲钠信标激光器，其转换效率为73.6％。与单个LBO晶体相比，总和频率效率提高了14.5％。包括声光锁模器的激光耦合振幅方程模型被用于理论和数值分析总和频率转换效率。