We demonstrate a 355 nm ultraviolet nanosecond laser produced by the type I phase-matched frequency doubling in a K₃B₆O₁₀Br (KBOB) nonlinear optical crystal. The use of 5022 μJ, 710 nm pump pulses at 10 Hz repetition rate produces 4.273 ns, 355 nm, 717 μJ pulses that corresponds to a frequency doubling conversion efficiency of 14.3%. The energy instability of the frequency-doubled pulse train measured is less than ±1% for maximum output pulse energy (∼717 μJ). Our experimental results show that KBOB is a promising nonlinear optical crystal for generating ultraviolet nanosecond laser pulses through frequency doubling.

中文翻译：

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K 3 B 6 O 10 Br非线性光学晶体中倍频产生的355 nm紫外纳秒激光器

我们演示了在K ₃ B ₆ O ₁₀ Br（KBOB）非线性光学晶体中由I型相位匹配倍频产生的355 nm紫外纳秒激光。使用5022 μ j，将10赫兹的重复率710个纳米泵脉冲产生4.273纳秒，355纳米，717 μ Ĵ脉冲，其对应于倍频的14.3％的转换效率。测得的频率加倍脉冲串的能量不稳定度小于±为最大输出脉冲能量（1％ 〜 717 μ j）。我们的实验结果表明，KBOB是一种有前途的非线性光学晶体，可通过倍频产生紫外纳秒激光脉冲。