High-performance frequency stabilization of ultraviolet diode lasers by using dichroic atomic vapor spectroscopy and transfer cavity

• URL: http://arxiv.org/abs/2004.03897v1
• Date: Wed, 8 Apr 2020 09:20:17 GMT
• Title: High-performance frequency stabilization of ultraviolet diode lasers by using dichroic atomic vapor spectroscopy and transfer cavity
• Authors: Danna Shen, Liangyu Ding, Qiuxin Zhang, Chenhao Zhu, Yuxin Wang, Wei Zhang, and Xiang Zhang
• Abstract summary: We develop a high-performance UV frequency stabilization technique implemented directly on UV diode lasers. As an example, we demonstrate a stable locking with frequency standard deviations of approximately 200 KHz and 300 KHz for 399nm and 370nm diode lasers. We achieve a long-term frequency drift of no more than 1 MHz for the target 370nm laser within an hour.
• Score: 16.530085733940528
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Ultraviolet (UV) diode lasers are widely used in many photonics applications. But their frequency stabilization schemes are not as mature as frequency-doubling lasers, mainly due to some limitations in the UV spectral region. Here we developed a high-performance UV frequency stabilization technique implemented directly on UV diode lasers by combining the dichroic atomic vapor laser lock and the resonant transfer cavity lock. As an example, we demonstrate a stable locking with frequency standard deviations of approximately 200 KHz and 300 KHz for 399nm and 370nm diode lasers in 20 minutes. We achieve a long-term frequency drift of no more than 1 MHz for the target 370nm laser within an hour, which was further verified with fluorescence counts rates of a single trapped $^{171}$Yb$^+$ ion. We also find strong linear correlations between lock points and environmental factors such as temperature and atmospheric pressure.

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