Low-noise suppression algorithm based on single-shot for laser complex amplitude measurements

Jing Wenbo, Wu X., Shen W., Feng X., Zhao Zhiyuan

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Jing W., Wu X., Shen W., Feng X., Zhao Z. Low-noise suppression algorithm based on single-shot for laser complex amplitude measurements [in English] // Opticheskii Zhurnal. 2023. V. 90. № 9. P. 73–81. http://doi.org/10.17586/1023-5086-2023-90-09-73-81

For citation (Journal of Optical Technology):

Wenbo Jing, Xueni Wu, Wen Shen, Xuan Feng, and Zhiyuan Zhao, "Low-noise suppression algorithm based on a single shot for laser complex amplitude measurements," Journal of Optical Technology. 90(9), 533-538 (2023). https://doi.org/10.1364/JOT.90.000533

Abstract:

Subject of study. Low-noise suppression algorithm based on single-shot is proposed for laser complex amplitude measurements. The purpose of the work is improvement of the well-known algorithm for measuring the complex amplitude of the field based on the determination of the phase difference. Method. The approach relies on a synchronization images acquisition system containing two CCD^{^[1]}s, while optimizing the objective function, combining the angular spectrum method and a nonlinear optimization algorithm. Main results. The synchronization images acquisition system captures the laser synchronously along the optical axis, obtaining two laser intensity images at different cross-sectional positions. The effect of low noise is suppressed by optimizing the objective function using iterative parameters consisting of a, b, and c. In combination with the angular spectrum method and using the nonlinear optimization algorithm, the complex amplitude of the laser is retrieved from the intensity image. Additionally, extensive simulative experiments have been carried out to verify the efficiency and high accuracy of this algorithm. Practical significance. The proposed single-shot-based low-noise suppression algorithm for laser complex amplitude measurements can achieve comparable measurement accuracy both simply and quickly under low-noise conditions.

Keywords:

laser complex amplitude, low-noise suppression, single-shot, objective function, iterative parameters

Acknowledgements:

this work was supported by Ministry of Science and Technology of the People's Republic of China (2018YFB1107600) and Jilin Scientific and Technological Development Program (20160204009GX, 20170204014GX, 20200401066GX). This work was also supported by the 111 Project of China (D21009)

OCIS codes: 140.0140, 120.5050, 070.0070

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