Chinese Optics Letters, 2019, 17 (7): 070901, Published Online: Jul. 9, 2019  

Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation Download: 863次

Author Affiliations
1 Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract
A method is proposed to optimize the recording structure of the photorefractive volume grating to compensate high spatial frequency in the distorted wavefront by optical phase conjugation. Based on the coupled-wave equation, the diffraction efficiency of the recorded grating formed by the scattered beams in different recording structures is simulated. The theoretical results show that the recorded modulations with high spatial frequency can be significantly improved in the small recording angle. In the experiment, three recording structures with the recording angles of 7.5°, 30°, and 45° are chosen to verify the compensation effect. Compared with the reconstructed image in the large recording angle of 45°, the signal to noise ratio of the image recorded at 7.5° increases to 3.2 times of that at 45°.

Pan Zhang, Dean Liu, Aihua Yang, Jianqiang Zhu. Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation[J]. Chinese Optics Letters, 2019, 17(7): 070901.

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