Diffraction characteristics of orthogonal gratings analysis based on a spatial light modulator

Zhongsheng Zhai; Qinyang Li; Xin Yu; Zhen Zeng; Qinghua Lv; Wei Feng; Zhi Xiong; Xuanze Wang

doi:10.1364/AO.467540

Applied Optics
Vol. 61,
Issue 25,
pp. 7393-7400
(2022)
•https://doi.org/10.1364/AO.467540

Diffraction characteristics of orthogonal gratings analysis based on a spatial light modulator

Zhongsheng Zhai, Qinyang Li, Xin Yu, Zhen Zeng, Qinghua Lv, Wei Feng, Zhi Xiong, and Xuanze Wang

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Zhongsheng Zhai, Qinyang Li, Xin Yu, Zhen Zeng, Qinghua Lv, Wei Feng, Zhi Xiong, and Xuanze Wang, "Diffraction characteristics of orthogonal gratings analysis based on a spatial light modulator," Appl. Opt. 61, 7393-7400 (2022)

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Abstract

The diffraction characteristics of orthogonal gratings with variable duty cycles and phase modulation depths are analyzed by using a spatial light modulator. The calculation methods of the transmission function, far-field diffraction light field, and diffraction efficiency of orthogonal gratings are deduced in theory. Meanwhile, the influences of the duty cycle and phase modulation depth on the diffraction characteristics of the orthogonal grating are discussed. The simulation and experimental results verify the correctness of the theoretical derivation. This method can be widely used in the fields of an optical vortex array, laser parallel processing, optical computing, optical communication, and optoelectronic hybrid processing.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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	Theoretical Results			Experimental Results
Phase $Φ$	0 order	(0,1)-order	(1,1)-order	0 order	(0,1)-order	(1,1)-order
$0.25 π$	89.02%	1.48%	0.60%	87.44%	1.15%	0.52%
$0.5 π$	62.50%	5.07%	2.05%	64.23%	4.21%	1.95%
$π$	25.00%	10.13%	4.11%	25.50%	9.20%	3.98%
$1.5 π$	62.50%	5.07%	2.05%	60.97%	4.18%	2.20%
$1.75 π$	89.02%	1.48%	0.60%	87.75%	1.12%	0.53%

	Theoretical Results				Experimental Results
Duty Cycle	0-order	(0,1)-order	(1,1)-order	(0,2)-order	0-order	(0,1)-order	(1,1)-order	(0,2)-order
0.3	67.24%	2.39%	1.76%	0.83%	68.92%	1.57%	1.28%	0.80%
0.4	46.24%	5.87%	3.36%	0.56%	45.03%	4.91%	3.84%	0.52%
0.5	25.00%	10.14%	4.11%	0%	26.11%	9.03%	3.86%	0
0.6	7.84%	13.20%	3.36%	1.26%	6.63%	13.56%	2.87%	1.22%
0.7	0.04%	13.00%	1.76%	4.50%	0.04%	12.03%	1.53%	4.39%

	Theoretical Results			Experimental Results
Phase $Φ$	0 order	(0,1)-order	(1,1)-order	0 order	(0,1)-order	(1,1)-order
$0.25 π$	89.02%	1.48%	0.60%	87.44%	1.15%	0.52%
$0.5 π$	62.50%	5.07%	2.05%	64.23%	4.21%	1.95%
$π$	25.00%	10.13%	4.11%	25.50%	9.20%	3.98%
$1.5 π$	62.50%	5.07%	2.05%	60.97%	4.18%	2.20%
$1.75 π$	89.02%	1.48%	0.60%	87.75%	1.12%	0.53%

	Theoretical Results				Experimental Results
Duty Cycle	0-order	(0,1)-order	(1,1)-order	(0,2)-order	0-order	(0,1)-order	(1,1)-order	(0,2)-order
0.3	67.24%	2.39%	1.76%	0.83%	68.92%	1.57%	1.28%	0.80%
0.4	46.24%	5.87%	3.36%	0.56%	45.03%	4.91%	3.84%	0.52%
0.5	25.00%	10.14%	4.11%	0%	26.11%	9.03%	3.86%	0
0.6	7.84%	13.20%	3.36%	1.26%	6.63%	13.56%	2.87%	1.22%
0.7	0.04%	13.00%	1.76%	4.50%	0.04%	12.03%	1.53%	4.39%

Abstract

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Applied Optics