Bright squeezed light in the kilohertz frequency band

Ruixin Li; Bingnan An; Nanjing Jiao; Junyang Liu; Lirong Chen; Yajun Wang; Yaohui Zheng

doi:10.1038/s41377-025-02013-7

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Bright squeezed light in the kilohertz frequency band

Original Articles

- Bright squeezed light in the kilohertz frequency band
- Light: Science & Applications Vol. 14, Issue 10, Pages: 3261-3269(2025)
- Affiliations：
  
  1.State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-Electronics, Shanxi University, 030006 Taiyuan, China
  2.Collaborative Innovation Center of Extreme Optics, Shanxi University, 030006 Taiyuan, Shanxi, China
- Author bio：
  
  Yajun Wang (YJWangsxu@sxu.edu.cn)
  Yaohui Zheng (yhzheng@sxu.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02013-7
  CLC：
- Received：30 March 2025，
  
  Revised：2025-08-14，
  
  Accepted：15 August 2025，
  
  Published Online：08 September 2025，
  
  Published：31 October 2025
- Accepted：
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Li, R. X. et al. Bright squeezed light in the kilohertz frequency band. Light: Science & Applications, 14, 3261-3269 (2025).
DOI：

Li, R. X. et al. Bright squeezed light in the kilohertz frequency band. Light: Science & Applications, 14, 3261-3269 (2025). DOI： 10.1038/s41377-025-02013-7.

摘要

Abstract

The dominant technical noise of a free-running laser practically limits bright squeezed light generation

particularly within the MHz band. To overcome this

we develop a comprehensive theoretical model for nonclassical power stabilization

and propose a novel bright squeezed light generation scheme incorporating hybrid power noise suppression. Our approach integrates broadband passive power stabilization with nonclassical active stabilization

extending the feedback bandwidth to MHz frequencies. This hybrid technique achieves an additional 9 dB technical noise suppression

establishing critical prerequisites for broadband bright squeezed light generation. Finally

a -5.5 dB bright squeezed light at 1 mW with kHz-MHz squeezing bandwidth was generated. The experimental results show excellent agreement with theoretical predictions

which represent we have comprehensively demonstrated a milliwatt-order bright squeezed light across kHz-MHz frequencies. Our work enables new quantum metrology applications and paves the way for next-generation quantum-enhanced technologies.Nonclassical hybrid passive–active power stabilization enables milliwatt-level bright squeezing across kHz–MHz band

关键词

Keywords

references

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