发表机构
Tsinghua University; North China University of Technology (NCUT)（清华大学; 华北理工大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文报道了利用四硼酸锶晶体通过单次通过二次谐波产生实现148.4纳米连续波真空紫外输出，功率约1.7纳瓦，并系统表征了信号对光束位置、角度、偏振和温度的依赖，为核光谱和时钟应用提供指导。
AI 中文摘要
我们报道了通过单次通过二次谐波产生，在四硼酸锶（SBO）晶体中将296.8纳米光转换为148.4纳米连续波（CW）真空紫外（VUV）辐射的实现。在约580毫瓦的入射基波功率下，我们估计晶体出口处的VUV输出功率约为1.7纳瓦。该晶体采用顶部籽晶溶液生长法生长，并在充氦气的腔室中运行。在真空下观察到的二次功率依赖关系，以及其在空气中的强烈抑制，支持了所产生的二次谐波的识别。我们进一步表征了VUV信号对光束位置、入射角、偏振和晶体温度的依赖性，为基于SBO的连续波VUV源在核光谱学和时钟应用中的实际指导提供了依据。
英文摘要
We report an implementation of continuous-wave (CW) vacuum-ultraviolet (VUV) generation at 148.4 nm by single-pass second-harmonic generation of 296.8 nm light in strontium tetraborate (SBO). At an incident fundamental power of approximately 580~mW, we estimate a VUV output power of approximately 1.7 nW at the crystal exit. The crystal is grown by the top-seeded solution growth method and operated in a helium-filled chamber. The quadratic power dependence observed under vacuum, together with its strong suppression in air, supports the identification of the generated second harmonic. We further characterize the dependence of the VUV signal on beam position, incidence angle, polarization, and crystal temperature, providing practical guidance for SBO-based CW VUV sources for nuclear spectroscopy and clock applications.
