Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation
A method is proposed to optimize the recording structure of the photorefractive volume grating to compensate the high spatial frequency in the distorted wavefront by optical phase conjugation. Based on 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 experiment, three recording structures with the recording angle 7.5°, 30° and 45° are chosen to verify the compensation effect. Compared with the reconstructed image in the large recording angle 45°, the signal to noise ratio of image recorded in 7.5° increases to 3.2 times.
作者单位：University of the Chinese Academy of Sciences
Shanghai Institute of Optics and Fine Mechanics
Zhang Pan,Liu Dean,Yang Aihua,Zhu Jianqiang. Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation[J].Chinese Optics Letters,2019,17(7):07.