Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation

Pan Zhang; Dean Liu; Aihua Yang; Jianqiang Zhu

doi:doi:10.3788/COL201917.070901

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： 866次

Pan Zhang ^1,2Dean Liu ^1,*Aihua Yang ^1,2Jianqiang Zhu ¹

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

Figures & Tables

Fig. 1. Recording geometry of scattered beams by photorefractive volume grating. Volume gratings 1 and 2 represent the signal volume grating and the photorefractive volume grating with high spatial frequency. $E_{r}$ , $E_{o}$ , and $E_{os}$ represent the reference beam, signal beam, and scattered noise beam, respectively. θ is the recording angle, $W_{R}$ and $W_{S}$ are the widths of $E_{r}$ and $E_{o}$ , respectively. $α$ is the angle between $E_{os}$ and the $x$ axis.

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Fig. 2. Effective wave vector ratio of photorefractive volume grating with high spatial frequency and diffraction efficiency of the traditional volume grating in different recording angles.

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Fig. 3. Experimental setup of analog OPC. M1–M5 are reflecting mirrors, SPF represents the spatial filter, and A1, A2 are the beam attenuators. BS1–BS3 are beam splitters, and L1–L7 are the lenses. A, $a$ , and $A^{*}$ represent the reference beam, the object beam, and the conjugate reference beam of A.

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Fig. 4. Experimental results of the USAF target (left column) and normalized one-dimensional intensity distribution (right column). The horizontal axis in the right column represents the coordinate value corresponding to the length of the red line, and the middle position of the red line is 0 μm. (a) Image without ground grass. (b) Conjugate reconstructed image without ground grass. (c) Image with the ground grass. (d)–(f) Images after OPC compensation in recording angles of 45°, 30°, and 7.5°, respectively.

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Fig. 5. Numerical fitting SNR and diffraction efficiency in different recording angles. The error bar shows the standard deviation of three experimental measurements.

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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.

Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation Download： 866次

Fig. 2. Effective wave vector ratio of photorefractive volume grating with high spatial frequency and diffraction efficiency of the traditional volume grating in different recording angles.

Fig. 5. Numerical fitting SNR and diffraction efficiency in different recording angles. The error bar shows the standard deviation of three experimental measurements.

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Optimization of compensation for high spatial frequency in distorted wavefront using optical phase conjugation Download： 866次

Fig. 2. Effective wave vector ratio of photorefractive volume grating with high spatial frequency and diffraction efficiency of the traditional volume grating in different recording angles.

Fig. 5. Numerical fitting SNR and diffraction efficiency in different recording angles. The error bar shows the standard deviation of three experimental measurements.

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