Harmonics-assisted optical phase amplifier

Wu-Zhen Li; Chen Yang; Zhi-Yuan Zhou; Yan Li; Yin-Hai Li; Su-Jian Niu; Zheng Ge; Li Chen; Guang-Can Guo; Bao-Sen Shi

doi:10.1038/s41377-022-01003-3

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Harmonics-assisted optical phase amplifier

Original Articles

- Harmonics-assisted optical phase amplifier
- Harmonics-assisted optical phase amplifier
- LSA 2022年11卷第11期页码：2748-2754
- Affiliations：
  
  1.CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China
  2.CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  3.Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
- Author bio：
  
  Zhi-Yuan Zhou (zyzhouphy@ustc.edu.cn)
  Bao-Sen Shi (drshi@ustc.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-01003-3
  中图分类号：
- 纸质出版日期：2022-11-30，
  
  网络出版日期：2022-10-27，
  
  收稿日期：2022-03-15，
  
  修回日期：2022-09-30，
  
  录用日期：2022-10-07
- Accepted：
Scan QR Code
Harmonics-assisted optical phase amplifier[J]. LSA, 2022,11(11):2748-2754.

Li, W. Z. et al. Harmonics-assisted optical phase amplifier. Light: Science & Applications, 11, 2748-2754 (2022).
Harmonics-assisted optical phase amplifier[J]. LSA, 2022,11(11):2748-2754. DOI： 10.1038/s41377-022-01003-3.

Li, W. Z. et al. Harmonics-assisted optical phase amplifier. Light: Science & Applications, 11, 2748-2754 (2022). DOI： 10.1038/s41377-022-01003-3.

摘要

Abstract

The change in the relative phase between two light fields serves as a basic principle for the measurement of the physical quantity that guides this change. It would therefore be highly advantageous if the relative phase could be amplified to enhance the measurement resolution. One well-known method for phase amplification involves the use of the multi-photon number and path-entangled state known as the NOON state; however

a high-number NOON state is very difficult to prepare and is highly sensitive to optical losses. Here we propose and experimentally demonstrate in principle a phase amplifier scheme with the assistance of a harmonic generation process. The relative phase difference between two polarization modes in a polarized interferometer is amplified coherently four times with cascaded second-harmonic generation processes. We demonstrate that these amplification processes can be recycled and therefore have the potential to realize much higher numbers of multiple amplification steps. The phase amplification method presented here shows considerable advantages over the method based on NOON states and will be highly promising for use in precision optical measurements.

关键词

Keywords

references

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