We present a narrow linewidth frequency-doubled Cr:LiSAF laser with a 450- to 460-nm tunability and maximum repetition frequency (RF) of 63 kHz. Under a pump power of ∼900 mW, the fundamental wavelength could be tuned at the range of 883 to 1020 nm, with a maximum output power of 180 mW at 910 nm. The pulsed operation was achieved by using an acousto-optical modulator. An LBO crystal was adopted for intra-cavity frequency doubling and a maximum output power of 44.8 mW was obtained at 455 nm, indicating a slope efficiency of 11.2%. The spectral linewidth was <0.1 nm in the whole tuning range.

中文翻译：

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455 nm 可调谐窄线宽 Q 开关倍频 Cr:LiSAF 激光器

我们提出了一种窄线宽倍频 Cr:LiSAF 激光器，具有 450 到 460 nm 的可调性和 63 kHz 的最大重复频率 (RF)。在约 900 mW 的泵浦功率下，基波波长可在 883 至 1020 nm 范围内调谐，在 910 nm 处的最大输出功率为 180 mW。脉冲操作是通过使用声光调制器实现的。采用 LBO 晶体进行腔内倍频，在 455 nm 处获得 44.8 mW 的最大输出功率，表明斜率效率为 11.2%。在整个调谐范围内，光谱线宽 <0.1 nm。