高功率连续波窄线宽253.7纳米深紫外激光器。

High-power continuous-wave narrow-linewidth 253.7 nm deep-ultraviolet laser.

作者信息

Zhao Ruchen, Fu Xiaohu, Zhang Lei, Fang Su, Sun Jianfang, Feng Yan, Xu Zhen, Wang Yuzhu

出版信息

Appl Opt. 2017 Nov 10;56(32):8973-8977. doi: 10.1364/AO.56.008973.

DOI:10.1364/AO.56.008973

Abstract

A 760 mW stable continuous-wave narrow-linewidth 253.7 nm deep-ultraviolet laser is developed for laser cooling of mercury atoms. It is based on a high-power 1014.8 nm room-temperature fiber laser amplifier and two cascaded efficient frequency-doubling stages. The saturated absorption spectrum of Hg202 on the 6S1-6P3 transition is demonstrated with a high signal-to-noise ratio. This deep-ultraviolet laser has significant applications in quantum optics and laser cooling of mercury atoms in 2D and 3D magneto-optical traps.

摘要

为了实现汞原子的激光冷却，研制了一台功率为760毫瓦、稳定的连续波、窄线宽253.7纳米深紫外激光器。它基于一个高功率1014.8纳米室温光纤激光放大器和两个级联的高效倍频级。展示了Hg202在6S1-6P3跃迁上的饱和吸收光谱，信噪比很高。这种深紫外激光器在量子光学以及二维和三维磁光阱中汞原子的激光冷却方面有重要应用。