ABSTRACT This paper describes a high-pulse-energy frequency-doubled ultraviolet dye laser operating at a repetition rate of 500 Hz. The pump source is a laser-diode side-pumped Q-switched Nd:YAG laser with a pulse energy of 29 mJ at 532 nm. A master oscillator power amplifier is employed to amplify the output pulse of the dye laser to 8.1 mJ at 566 nm, and by frequency doubling with BBO crystal a pulse energy of 1.7 mJ at 283 nm is achieved with a pulse width of 8 ns. This is more than four times the largest reported pulse energies generated by other fixed-frequency dye lasers when operating at repetition rates of more than 1 kHz. The conversion efficiency and stability of dye laser are discussed, which show the potential for high-speed laser diagnostics in the fields of combustion and turbulent flow detection.

中文翻译：

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500 Hz 紫外染料激光器，脉冲能量为 1.7 mJ，具有 PLIF 成像潜力

摘要 本文介绍了一种重复频率为 500 Hz 的高脉冲能量倍频紫外染料激光器。泵浦源是激光二极管侧泵浦 Q 开关 Nd:YAG 激光器，脉冲能量为 29 mJ，波长为 532 nm。采用主振荡器功率放大器将染料激光器的输出脉冲放大至 566 nm 处的 8.1 mJ，并通过 BBO 晶体倍频实现 283 nm 处 1.7 mJ 的脉冲能量，脉冲宽度为 8 ns。这是其他固定频率染料激光器在重复频率超过 1 kHz 时产生的最大脉冲能量的四倍多。讨论了染料激光的转换效率和稳定性，显示了在燃烧和湍流检测领域中高速激光诊断的潜力。