Influence of Continuous Phase Plate on Backscattered Transmission Characteristics of SBS Laser Light at Target

Shouying Xu; Shenlei Zhou; Yufeng Gong; Junyong Zhang; Rong Wu; Dean Liu

doi:10.3788/AOS202040.2205001

Acta Optica Sinica, Volume. 40, Issue 22, 2205001(2020)

Influence of Continuous Phase Plate on Backscattered Transmission Characteristics of SBS Laser Light at Target

Shouying Xu^1,2, Shenlei Zhou^1、*, Yufeng Gong^1,2, Junyong Zhang¹, Rong Wu¹, and Dean Liu¹

¹Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

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Figures & Tables(9)

Fig. 1. Phase distribution of CPP1 and far-field focal spot. (a) Phase distribution; (b) far-field focal spot

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$CPP phase and near-field diffraction of backward SBS light. (a) CPP phase; (b) near-field diffraction; (c) probability density function of near-field diffraction fluence$

Fig. 2. CPP phase and near-field diffraction of backward SBS light. (a) CPP phase; (b) near-field diffraction; (c) probability density function of near-field diffraction fluence

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$Near-field diffraction under different diffraction distances. (a) One-dimensional near-field diffraction intensity in XOZ plane; (b) maximum intensity and contrast; (c) local intensity comparison$

Fig. 3. Near-field diffraction under different diffraction distances. (a) One-dimensional near-field diffraction intensity in XOZ plane; (b) maximum intensity and contrast; (c) local intensity comparison

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Fig. 4. Different CPP phases. (a) CPP1; (b) CPP2; (c) CPP3; (d) CPP4

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$Back near-field diffraction at 5 m from different CPP. (a) CPP1; (b) CPP2; (c) CPP3; (d) CPP4$

Fig. 5. Back near-field diffraction at 5 m from different CPP. (a) CPP1; (b) CPP2; (c) CPP3; (d) CPP4

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$Probability density functions of back near-field diffraction fluence under different CPPs$

Fig. 6. Probability density functions of back near-field diffraction fluence under different CPPs

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$Back near-field diffraction results under different CPPs and probability density functions of near-field diffraction fluence. (a) 1ω CPP, back near-field diffraction; (b) 2ω CPP, back near-field diffraction; (c) probability density functions of near-field diffraction fluence$

Fig. 7. Back near-field diffraction results under different CPPs and probability density functions of near-field diffraction fluence. (a) 1ω CPP, back near-field diffraction; (b) 2ω CPP, back near-field diffraction; (c) probability density functions of near-field diffraction fluence

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Table 1. Evaluation functions of CPP

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Table 1. Evaluation functions of CPP

CPP	L_cpp/mm	g	GRMS /(rad·mm^-1)	Near-field		Far-field
CPP	L_cpp/mm	g	GRMS /(rad·mm^-1)	Contrast /%	Imax	Rms / %	Ratio /%
CPP1	8	11.9	0.2948	5.82		1.2473		58.0	98.6
CPP2	16	13.2	0.3098	4.02		1.1208		81.9	98.8
CPP3	8	25.8	0.5436	10.68		2.4207		79.4	99.1
CPP4	8	11.4	0.2879	5.55		1.1953		61.3	99.3

Table 2. Evaluation functions of 1ω CPP and 2ω CPP
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Table 2. Evaluation functions of 1ω CPP and 2ω CPP
CPP GRMS /(rad·mm^-1) Near-field
Contrast /% Imax
1ω CPP 0.2948 5.82 1.2473
2ω CPP 0.294 5.54 1.2394

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Shouying Xu, Shenlei Zhou, Yufeng Gong, Junyong Zhang, Rong Wu, Dean Liu. Influence of Continuous Phase Plate on Backscattered Transmission Characteristics of SBS Laser Light at Target[J]. Acta Optica Sinica, 2020, 40(22): 2205001

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