A high-repetition-rate single-frequency injection-seeded Q-switched Er:YAG laser with a ‘double reflection’ architecture is reported. Single-frequency laser pulses at a pulse repetition frequency (PRF) of 2 kHz are obtained by using ‘ramp-fire’ injection-seeding technique. The half-width of the pulse spectrum is measured to be 2.05 MHz by using the heterodyne beating technique. The novel ‘double-reflection’ architecture is employed in order to achieve a stable high-repetition-rate single-frequency operation. As far as we know, 2 kHz is the highest PRF achieved from a single-frequency, injection-seeded Q-switched Er:YAG laser that can be used in a wind Lidar system.

中文翻译：

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具有“双反射”架构的2 kHz单频，注入种子Q开关激光器

报道了一种具有“双反射”结构的高重复频率单频注入种子调Q的Er：YAG激光器。通过使用“斜坡发射”注入播种技术可获得2 kHz的脉冲重复频率（PRF）的单频激光脉冲。使用外差拍打技术测得的脉冲频谱的半峰宽为2.05 MHz。为了实现稳定的高重复频率单频操作，采用了新颖的“双反射”架构。据我们所知，2 kHz是可在风激光雷达系统中使用的单频，注入种子的Q开关Er：YAG激光器实现的最高PRF。