Laser beam coherence and divergence angle complex controlling technique

Ni Xiaolong; Zhu Xufang; Yu Xin; Yao Haifeng; Chen Chunyi; Liu Zhi

doi:10.11884/HPLPB202032.200078

Volume 32 Issue 7

Jun. 2020

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(7): 071008

Ni Xiaolong, Zhu Xufang, Yu Xin, et al. Laser beam coherence and divergence angle complex controlling technique[J]. High Power Laser and Particle Beams, 2020, 32: 071008. doi: 10.11884/HPLPB202032.200078

Citation:

Ni Xiaolong, Zhu Xufang, Yu Xin, et al. Laser beam coherence and divergence angle complex controlling technique[J]. High Power Laser and Particle Beams, 2020, 32: 071008. doi: 10.11884/HPLPB202032.200078

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Laser beam coherence and divergence angle complex controlling technique

doi: 10.11884/HPLPB202032.200078

Ni Xiaolong^{1, 2
,},
Zhu Xufang¹,
Yu Xin^{2, 3},
Yao Haifeng^{1, 2},
Chen Chunyi⁴,
Liu Zhi^{1
,
,}

1.
National and Local Joint Engineering Research Center of Space Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China
2.
Changchun Lighteek Photonics Co., Ltd, Changchun 130000, China
3.
College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
4.
School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China

Received Date: 2020-03-25
Rev Recd Date: 2020-06-09
Publish Date: 2020-06-24

Abstract

Abstract

To reduce the complexity and cost of partially coherent optical system, increase the convenience of partially coherent laser beam application, in this paper, we presents a method to control the coherence and divergence angle of laser beam complexly, using a liquid crystal spatial light modulator (LC-SLM). First, we introduce the basic theory and method to control the coherence and divergence angle of laser beam complexly using an LC-SLM; then, we put forward the experiment to test the coherence and divergence angle controlling accuracy. The experiment results show that, for a partially coherent laser beam with the coherence and divergence angle of 0.9 mm, 7.5 mrad and 1.5 mm, 3.8 mrad, the error of coherence is less than 5%, the root-mean-square errors of the degree of coherence are 0.027 386 and 0.031 314, and the peak-to-valley values are 0.084 658 and 0.089 103 respectively; the error of divergence angle is less than 5%, the root-mean-square errors of the divergence angle are 0.022 478 and 0.023 186, and the peak-to-valley values are 0.081 201 and 0.092 130 respectively. This method can control degree of coherence and divergence angle with high accuracy.
- atmospheric optics,
- coherence,
- liquid crystal spatial light modulator,
- divergence angle

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References(21)

References

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