We report a high-energy single-frequency deep-ultraviolet (DUV) solid-state laser at 167.079 nm by the eighth-harmonic generation of a diode-pumped Nd:LGGG laser. A maximum DUV laser output energy of 1.5 μJ at a 5 Hz repetition rate with a 200 μs pulse duration is achieved. The central wavelength of the DUV laser is located at 167.079 nm and can be finely tuned from 167.075 to 167.083 nm. The linewidth is estimated to be 0.025 pm. To the best of our knowledge, this is the first Letter reporting a high-energy single-frequency solid-state DUV laser below 170 nm. The successful demonstration of the high-energy single-frequency DUV laser source with the unique wavelength is useful for direct detection of a ${}^{27}{\mathrm{Al}}^{+}$ ion via resonance fluorescence in a multi-ion optical clock.

中文翻译：

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高能单频167 nm深紫外激光器

我们通过二极管泵浦Nd：LGGG激光的第八谐波产生报告了167.079 nm的高能单频深紫外（DUV）固态激光器。在5 Hz重复频率下，具有200μs的脉冲持续时间，最大DUV激光器输出能量为1.5μJ。DUV激光器的中心波长位于167.079 nm，可以在167.075 nm至167.083 nm之间进行微调。线宽估计为0.025 pm。据我们所知，这是第一封信，报道了一种170 nm以下的高能单频固态DUV激光器。具有独特波长的高能量单频DUV激光源的成功演示可用于直接检测${}^{27}{铝}^{+}$ 在多离子光学时钟中通过共振荧光产生离子。