Abstract Buried cladding waveguides in Nd:KGW crystals were fabricated by femtosecond laser writing at a repetition rate of 500 kHz. Excellent waveguiding performance with low insertion loss of 1.8 dB at 1.06 μm wavelength was obtained. The waveguide is also characterized by Raman spectroscopy. Under optical pump of 806 nm light, continuous-wave waveguide lasers at 1067 nm have been achieved at room temperature. Fundamental- and high-order-mode guiding and lasing were realized by varying the waveguide diameter. A 40-μm diameter waveguide generates the maximum output power 198.5 mW with a slope efficiency of 39.4%.

中文翻译：

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飞秒激光写入 Nd:KGW 波导中的包层波导激光器

摘要 在 Nd:KGW 晶体中埋藏包层波导是通过飞秒激光写入以 500 kHz 的重复频率制造的。获得了出色的波导性能，在 1.06 μm 波长处插入损耗低，仅为 1.8 dB。波导的特征还在于拉曼光谱。在 806 nm 光的光泵浦下，已在室温下实现了 1067 nm 的连续波波导激光器。通过改变波导直径来实现基波和高阶模引导和激光。直径为 40 微米的波导产生最大输出功率 198.5 mW，斜率效率为 39.4%。