Han Ye, Guo Kun, Zhao Yuquan, Xiong Mengyuan, Wang Dong, Chen Jianfa, Cui Xudong, Xu Bin
Opt Lett. 2024 Jul 15;49(14):3854-3857. doi: 10.1364/OL.528102.
Single-frequency (SF) lasers in the visible spectral region are usually obtained through an indirect method, i.e., frequency doubling of near-infrared SF lasers. In this work, we report on the direct generation of a high-power continuous-wave (CW) SF laser in red based on a diode-pumped Pr:LiYF (YLF) ring cavity technology. A maximum output power is scaled to 3.98 W at 640 nm with a linewidth of about 17.2 MHz and a power stability of 0.6%. Moreover, by inserting a LBO crystal into the ring cavity for intracavity frequency doubling of the 640 nm SF laser, we have also successfully demonstrated an ultraviolet (UV) SF laser at 320 nm, for the first time to the best of our knowledge, with a maximum power of 670 mW. This work provides a promising route for the development of simple, compact, and high-power SF lasers operating in visible and UV spectral regions.
可见光谱区域的单频（SF）激光器通常通过间接方法获得，即对近红外单频激光器进行倍频。在这项工作中，我们报道了基于二极管泵浦Pr:LiYF（YLF）环形腔技术直接产生高功率连续波（CW）红色单频激光器。在640nm处，最大输出功率扩展至3.98W，线宽约为17.2MHz，功率稳定性为0.6%。此外，通过在环形腔中插入一块LBO晶体，对640nm单频激光器进行腔内倍频，据我们所知，我们还首次成功演示了波长为320nm的紫外（UV）单频激光器，最大功率为670mW。这项工作为开发在可见光和紫外光谱区域工作的简单、紧凑且高功率的单频激光器提供了一条有前景的途径。
