Research on array laser tilt correction technology based on composite sensing

Yue Zhou; Yi Tan; Linxiong Wen; Liliang Yang

doi:10.1117/12.2691310

16 October 2023 Research on array laser tilt correction technology based on composite sensing

Yue Zhou, Yi Tan, Linxiong Wen, Liliang Yang

Proceedings Volume 12792, Eighteenth National Conference on Laser Technology and Optoelectronics; 127921K (2023) https://doi.org/10.1117/12.2691310
Event: Eighteenth National Conference on Laser Technology and Optoelectronics, 2023, Shanghai, China

Abstract

In order to achieve accurate superposition of array lasers in the far field and ensure the quality of the array laser synthetic beam, it is required that the array laser sub-beams point in the same direction, i.e., there is no tilt aberration between the sub-beams. To this end, a composite sensing-based array laser tilt detection and correction method is proposed, which combines single-lens detection with microlens array detection and can achieve large dynamic range, high accuracy and high bandwidth correction to a certain extent. The basic principle of the method is: for the large dynamic range of the array laser first use microlens detection and stochastic parallel gradient descent algorithm (SPGD) for coarse correction, when the array laser sub-beam into the microlens array range, use microlens detection and PI control combined to achieve fast and high precision correction of the array laser tilt aberration. The tilt correction effect of the composite sensing-based array laser tilt correction method is compared with that of the SPGD control algorithm alone and the PI control algorithm alone, and the results show that the iteration efficiency of this method is 3.5 times higher than that of the SPGD algorithm alone for the same tilt correction results, and the synthetic beam quality is significantly improved after the tilt correction. The composite sensing-based array laser tilt aberration correction solves the contradiction between large dynamic range and high accuracy and high bandwidth to a certain extent without significantly increasing the system complexity, and effectively improves the anti-jamming ability and environmental adaptability of the array laser, which has great potential and promising application.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yue Zhou, Yi Tan, Linxiong Wen, and Liliang Yang "Research on array laser tilt correction technology based on composite sensing", Proc. SPIE 12792, Eighteenth National Conference on Laser Technology and Optoelectronics, 127921K (16 October 2023); https://doi.org/10.1117/12.2691310

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KEYWORDS

Aberration correction

Microlens array

Detector arrays

Detection and tracking algorithms

Calibration

Laser applications

Cameras

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