Plane Wavefront Distortion and Its Effect on Laser Coherent Synthesis Efficiency (Invited)

Hao Zhang; Xingwang Kang; Yang Liu; Meiling Guan; Qin Wen; Xinglin Zhong; Huahua Wang; Jian Wu; Lu Gao; Ze Zhang

doi:10.3788/LOP232671

Laser & Optoelectronics Progress, Volume. 61, Issue 7, 0706009(2024)

Plane Wavefront Distortion and Its Effect on Laser Coherent Synthesis Efficiency (Invited)

Hao Zhang^1,2, Xingwang Kang^1,3, Yang Liu⁴, Meiling Guan¹, Qin Wen¹, Xinglin Zhong², Huahua Wang⁵, Jian Wu², Lu Gao⁵, and Ze Zhang^1,2,4,6、*

Author Affiliations

¹Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

²School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

³School of Optoelectronics, University of Chinese Academy of Sciences, Beijing 100049, China

⁴Qilu Aerospace Information Research Institute, Jinan 250101, Shandong , China

⁵School of Science, China University of Geosciences (Beijing), Beijing 100083, China

⁶Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing 100094, China

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Figures & Tables(6)

Fig. 1. Schematic diagram of Gaussian laser array transmission

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$Simulation results of number of sub-beams in laser array is 2×2, 3×3, 4×4, respectively. (a1)‒(a3) Near-field simulation patterns of laser arrays, and circle represents circumscribed circle of array; (b1)‒(b3) diffraction patterns of laser arrays at z=z0, and z0 is position where adjacent beams of laser arrays meet; (c1)‒(c3) diffraction patterns of laser arrays at 1 km, and circle represents round barrel$

Fig. 2. Simulation results of number of sub-beams in laser array is 2×2, 3×3, 4×4, respectively. (a1)‒(a3) Near-field simulation patterns of laser arrays, and circle represents circumscribed circle of array; (b1)‒(b3) diffraction patterns of laser arrays at z=z₀, and z₀ is position where adjacent beams of laser arrays meet; (c1)‒(c3) diffraction patterns of laser arrays at 1 km, and circle represents round barrel

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Fig. 3. Relationship between P_PIB and S. (a) Number of sub-beams is 2×2, 3×3, 4×4,respectively; (b) multiple situations with different numbers of sub-beams,points represent simulation results and curves represent fitting results

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Fig. 4. $S$ versus beam quality factor $M^{2}$ and atmospheric coherence length $r_{0}$ . (a) Simulation results of $S$ varying with different beam quality factors $M^{2}$ for Gaussian beam with waist radius of 0.3, 0.5, and 0.7 mm, respectively. (b) simulation results of $S$ varying with different atmospheric coherence lengths $r_{0}$ with waist radius of 0.3 mm, and points represent simulation results and curves represent fitting result

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Fig. 5. Intensity distribution of laser arrays with different numbers of sub-beams and relationship curve between P_PIB and S when ω₀=1 mm. (a1)‒(a3) Light intensity distribution (simulation results) at z=0 m, circle represents circumscribed circle of array; (b1)‒(b3) light intensity distribution at z=28 m (simulation results), circle represents circular barrel; (c1)‒(c3) experimental light intensity distribution at z=28 m, circle represents circular barrel; (d) relationship between P_PIB and $S$

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Table 1. Variation of S with r₀ and M²

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Table 1. Variation of S with r₀ and M²

$ω_{0}$ /mm	$r_{0}$ /m	$M^{2}$	$S$ /m²
0.3	∞	1.000	1.981×10^-7
	0.15	1.364	5.028×10^-7
	0.10	1.476	6.371×10^-7
0.5	∞	1.000	4.280×10^-8
	0.15	1.930	3.077×10^-7
	0.10	2.304	5.234×10^-7
0.7	∞	1.000	1.560×10^-8
	0.15	2.855	3.630×10^-7
	0.10	4.591	1.509×10^-6

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Hao Zhang, Xingwang Kang, Yang Liu, Meiling Guan, Qin Wen, Xinglin Zhong, Huahua Wang, Jian Wu, Lu Gao, Ze Zhang. Plane Wavefront Distortion and Its Effect on Laser Coherent Synthesis Efficiency (Invited)[J]. Laser & Optoelectronics Progress, 2024, 61(7): 0706009

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