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  • Received: Oct. 21, 2015

    Accepted: Jan. 8, 2016

    Posted: Jan. 24, 2019

    Published Online: Aug. 6, 2018

    The Author Email: Bing Dong (bdong@bit.edu.cn)

    DOI: 10.3788/COL201614.031406

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    Bing Dong, Rui Wang. Laser beam cleanup using improved model-based wavefront sensorless adaptive optics[J]. Chinese Optics Letters, 2016, 14(3): 031406

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Chinese Optics Letters, Vol. 14, Issue 3, 031406 (2016)

Laser beam cleanup using improved model-based wavefront sensorless adaptive optics

Bing Dong*and Rui Wang

Author Affiliations

  • School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China

Abstract

An improved model-based wavefront sensorless adaptive optics algorithm is proposed for laser beam cleanup. Deformable mirror (DM) eigenmodes are used to replace traditional Lukosz modes in order to avoid DM fitting errors. The traditional method is based on a sophisticated calibration process and solving linear equations. In our method, coefficients of DM eigenmodes are estimated by adding bidirectional modal biases into the system and then solving parabolic equations. The calibration process is omitted in our method, which makes it more feasible. From simulation and experimental results, the corrective accuracy of the improved method is higher than the traditional one.