Development of a deep-ultraviolet pulse laser source operating at 234 nm for direct cooling of Al+ ion clocks

Haoyu Wu, Zhaiqiong Zhang, Si Chen, Kexiong Sun, Jinghua Sun, Derryck T. Reid, Zehuang Lu, Jie Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the development of a 250-MHz 234 nm deep-ultraviolet pulse source based on a flexible wavelength-conversion scheme. The scheme is based on a frequency-doubled optical parametric oscillator (FD-OPO) together with a cascaded frequency conversion process. We use a χ(2) nonlinear envelope equation to guide the design of an intra-cavity OPO crystal, demonstrating a flexible broadband tunable feature and providing as high as watt-level of a frequency-doubled signal output centered at 850 nm, which is served as an input wave for the cascaded frequency conversion process. As much as 3.0 mW of an average power at 234 nm is obtained, with an rms power stability of better than 1% over 20 minutes. This deep-ultraviolet pulse laser source can be used for many applications in quantum optics and for direct laser cooling of Al+ ion clocks.

Original languageEnglish
Pages (from-to)11468-11478
Number of pages11
JournalOptics Express
Volume29
Issue number8
Early online date29 Mar 2021
DOIs
Publication statusPublished - 12 Apr 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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