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arXiv · 2001.11225

A 30 W, sub-kHz frequency-locked laser at 532 nm

Hao-Ze Chen·Xiang-Pei Liu·Xiao-Qiong Wang·Yu-Ping Wu·Yu-Xuan Wang·Xing-Can Yao·Yu-Ao Chen·Jian-Wei Pan
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Abstract

We report on the realization of a high-power, ultranarrow-linewidth, and frequency-locked 532~nm laser system. The laser system consists of single-pass and intra-cavity second harmonic generation of a continuous-wave Ytterbium doped fiber laser at 1064~nm in the nonlinear crystal of periodically poled lithium niobate and lithium triborate, respectively. With 47~W infrared input, 30~W green laser is generated through the type I critical phase matching in the intracavity lithium triborate crystal. The laser linewidth is measured to be on the order of sub-kHz, which is achieved by simultaneously locking the single-pass frequency doubling output onto the iodine absorption line R69 (36-1) at 532~nm. Furthermore, the phase locking between the laser system and another slave 1064~nm laser is demonstrated with relative frequency tunability being up to 10~GHz. Our results completely satisfy the requirements of 532~nm laser for quantum simulation with ultracold atoms.

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Hao-Ze Chen, Xiang-Pei Liu, Xiao-Qiong Wang, Yu-Ping Wu, Yu-Xuan Wang, Xing-Can Yao, Yu-Ao Chen, Jian-Wei Pan. 2020-01-30. A 30 W, sub-kHz frequency-locked laser at 532 nm. https://doi.org/10.1364/oe.26.033756

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