Optically pumped Milliwatt Whispering-Gallery microcavity laser

Huiqi Li; Zhaocong Wang; Lei Wang; Yang Tan; Feng Chen

doi:10.1038/s41377-023-01264-6

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Optically pumped Milliwatt Whispering-Gallery microcavity laser

Original Articles

- Optically pumped Milliwatt Whispering-Gallery microcavity laser
- Light: Science & Applications Vol. 12, Issue 10, Pages: 2154-2162(2023)
- Affiliations：
  
  School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, China
- Author bio：
  
  Yang Tan (tanyang@sdu.edu.cn)
  Feng Chen (drfchen@sdu.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01264-6
  CLC：
- Published：31 October 2023，
  
  Published Online：12 September 2023，
  
  Received：02 February 2023，
  
  Revised：25 July 2023，
  
  Accepted：18 August 2023
- Accepted：
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Li, H. Q. et al. Optically pumped Milliwatt Whispering-Gallery microcavity laser. Light: Science & Applications, 12, 2154-2162 (2023).
DOI：

Li, H. Q. et al. Optically pumped Milliwatt Whispering-Gallery microcavity laser. Light: Science & Applications, 12, 2154-2162 (2023). DOI： 10.1038/s41377-023-01264-6.

摘要

Abstract

Whispering-gallery-mode microcavity lasers possess remarkable characteristics such as high

factors and compact geometries

making them an essential element in the evolution of microlasers. However

solid-state whispering-gallery-mode lasers have previously suffered from low output power and limited optical conversion efficiency

hindering their applications. Here

we present the achievement of milliwatt laser emissions at a wavelength of 1.06 µm from a solid-state whispering-gallery-mode laser. To accomplish this

we construct a whispering-gallery-mode microcavity (with a diameter of 30 µm) using a crystalline Nd: YAG thin film obtained through carbon-implantation enhanced etching of a Nd: YAG crystal. This microcavity laser demonstrates a maximum output power of 1.12 mW and an optical conversion efficiency of 12.4%. Moreover

our unique eccentric microcavity design enables efficient coupling of free-space pump light

facilitating integration with a waveguide. This integration allowed for single-wavelength laser emission from the waveguide

achieving an output power of 0.5 mW and an optical conversion efficiency of 6.18%. Our work opens up new possibilities for advancing solid-state whispe

ring-gallery-mode lasers

providing a viable option for compact photonic sources.

关键词

Keywords

references

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