Tight Focusing Properties of Gaussian Beams with Asymmetric Off-Axis Bi-Phase Singularities

Fig. 1. Intensity and phase distributions of asymmetric off-axis double phase singularity Gaussian beams. (a) $a = 0.1 ω$ , $b = 0.2 ω$ ;(b) $a = 0.2 ω$ , $b = 0.3 ω$ ; (c) $a = 0.5 ω$ , $b = 0.6 ω$ ; (d) $a = 0.7 ω$ , $b = 0.8 ω$

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Fig. 2. Schematic diagram of focusing system with large NA lens

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Fig. 3. Intensity distributions on focus of asymmetric off-axis bi-phase singularity beams ( $a = 0.3 ω$ ). (a)(e) $b$ = $0.1 ω$ ; (b)(f) $b$ = $0.3 ω$ ;(c)(g) $b$ = $0.5 ω$ ; (d)(h) $b$ = $0.7 ω$

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Fig. 4. Intensity distribution on focus of asymmetric off-axis bi-phase singularity beam with $m = n = 3$ , $a = 0.5 ω$ , and $b = 0.7 ω$

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Fig. 5. Intensity distributions on the focus of the asymmetric off-axis bi-phase singularity beams. (a) $a = b = 0.3 ω$ , $m = 1$ , $n = 1$ ; (b) $a = b = 0.4 ω$ , $m = 1$ , $n = 2$ ; (c) $a = b = 0.45 ω$ , $m = 1$ , $n = 3$ ; (d) $a = b = 0.4 ω$ , $m = 2$ , $n = 1$ ; (e) $a = b = 0.5 ω$ , $m = 2$ , $n = 2$ ; (f) $a = b = 0.5 ω$ , $m = 2$ , $n = 3$ ; (g) $a = b = 0.45 ω$ , $m = 3$ , $n = 1$ ; (h) $a = b = 0.5 ω$ , $m = 3$ $n = 2$ ; (i) $a = b = 0.6 ω$ , $m = 3$ , $n = 3$

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Xiyu Yan, Yanfang Yang, Ying He, Lulu Li, Junjie Wang. Tight Focusing Properties of Gaussian Beams with Asymmetric Off-Axis Bi-Phase Singularities[J]. Acta Optica Sinica, 2022, 42(20): 2026001

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Paper Information

Category: Physical Optics

Received: Mar. 21, 2022

Accepted: Apr. 29, 2022

Published Online: Oct. 18, 2022

The Author Email: Yang Yanfang (yanfangyang@shu.edu.cn)

DOI:10.3788/AOS202242.2026001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology