Mid-infrared computational temporal ghost imaging

Han Wu; Bo Hu; Lu Chen; Fei Peng; Zinan Wang; Goëry Genty; Houkun Liang

doi:10.1038/s41377-024-01426-0

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Mid-infrared computational temporal ghost imaging

Original Articles

- Mid-infrared computational temporal ghost imaging
- Light: Science & Applications Vol. 13, Issue 6, Pages: 1088-1097(2024)
- Affiliations：
  
  1.College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan 610064, China
  2.College of Electrical Engineering, Sichuan University, Chengdu, Sichuan 610064, China
  3.Key Lab of Optical Fiber Sensing & Communications, University of Electronic Science & Technology of China, Chengdu, Sichuan 611731, China
  4.Laboratory of Photonics, Tampere University, FI-33014 Tampere, Finland
- Author bio：
  
  Fei Peng (pengfei@scu.edu.cn)
  Goëry Genty (goery.genty@tuni.fi)
  Houkun Liang (hkliang@scu.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01426-0
  CLC：
- Received：09 October 2023，
  
  Revised：2024-03-12，
  
  Accepted：13 March 2024，
  
  Published Online：28 May 2024，
  
  Published：30 June 2024
- Accepted：
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Wu, H. et al. Mid-infrared computational temporal ghost imaging. Light: Science & Applications, 13, 1088-1097 (2024).
DOI：

Wu, H. et al. Mid-infrared computational temporal ghost imaging. Light: Science & Applications, 13, 1088-1097 (2024). DOI： 10.1038/s41377-024-01426-0.

摘要

Abstract

Ghost imaging in the time domain allows for reconstructing fast temporal objects using a slow photodetector. The technique involves correlating random or pre-programmed probing temporal intensity patterns with the integrated signal measured after modulation by the temporal object. However

the implementation of temporal ghost imaging necessitates ultrafast detectors or modulators for measuring or pre-programming the probing intensity patterns

which are not available in all spectral regions especially in the mid-infrared range. Here

we demonstrate a frequency downconversion temporal ghost imaging scheme that enables to extend the operation regime to arbitrary wavelengths regions where fast modulators and detectors are not available. The approach modulates a signal with temporal intensity patterns in the near-infrared and transfers the patterns to an idler via difference-frequency generation in a nonlinear crystal at a wavelength where the temporal object can be retrieved. As a proof-of-concept

we demonstrate computational temporal ghost imaging in the mid-infrared with operating wavelength that can be tuned from 3.2 to 4.3 μm. The scheme is flexible and can be extended to other regimes. Our results introduce new possibilities for scan-free pump-probe imaging and the study of ultrafast dynamics in spectral regions where ultrafast modulation or detection is challenging such as the mid-infrared and THz regions.

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Keywords

references

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