Ultra-broadband diffractive imaging with unknown probe spectrum

Chuangchuang Chen; Honggang Gu; Shiyuan Liu

doi:10.1038/s41377-024-01581-4

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Ultra-broadband diffractive imaging with unknown probe spectrum

Original Articles

- Ultra-broadband diffractive imaging with unknown probe spectrum
- Light: Science & Applications Vol. 13, Issue 10, Pages: 2276-2287(2024)
- Affiliations：
  
  1.State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
  2.Optics Valley Laboratory, Wuhan, Hubei 430074, China
- Author bio：
  
  Honggang Gu (hongganggu@hust.edu.cn)
  Shiyuan Liu (shyliu@hust.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01581-4
  CLC：
- Received：22 April 2024，
  
  Revised：03 August 2024，
  
  Accepted：2024-08-13，
  
  Published Online：26 August 2024，
  
  Published：31 October 2024
- Accepted：
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Chen, C. C., Gu, H. G. & Liu, S. Y. Ultra-broadband diffractive imaging with unknown probe spectrum. Light: Science & Applications, 13, 2276-2287 (2024).
DOI：

Chen, C. C., Gu, H. G. & Liu, S. Y. Ultra-broadband diffractive imaging with unknown probe spectrum. Light: Science & Applications, 13, 2276-2287 (2024). DOI： 10.1038/s41377-024-01581-4.

摘要

Abstract

Strict requirement of a coherent spectrum in coherent diffractive imaging (CDI) architectures poses a significant obstacle to achieving efficient photon utilization across the full spectrum. To date

nearly all broadband computational imaging experiments have relied on accurate spectroscopic measurements

as broad spectra are incompatible with conventional CDI systems. This paper presents an advanced approach to broaden the scope of CDI to ultra-broadband illumination with unknown probe spectrum

effectively addresses the key challenges encountered by existing state-of-the-art broadband diffractive imaging frameworks. This advancement eliminates the necessity for

prior

knowledge of probe spectrum and relaxes constraints on non-dispersive samples

resulting in a significant extension in spectral bandwidth

achieving a nearly fourfold improvement in bandlimit compared to the existing benchmark. Our method not only monochromatizes a broadband diffraction pattern from unknown illumination spectrum

but also determines the compressive sampled profile of spectrum of the diffracted radiation. This superiority is experimentally validated using both CDI and ptychography techniques on an ultra-broadband supercontinuum with relative bandwidth exceeding 40%

revealing a significantly enhanced coherence and improved reconstruction with high fidelity under ultra-broadband illumination.

关键词

Keywords

references

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