Measuring high orbital angular momentum of vortex beams with an improved multipoint interferometer

Qi Zhao; Miao Dong; Yihua Bai; Yuanjie Yang

doi:doi:10.1364/PRJ.384925

Photonics Research, 2020, 8 (5): 05000745, Published Online: Apr. 26, 2020

Measuring high orbital angular momentum of vortex beams with an improved multipoint interferometer Download： 638次

Qi Zhao ^1,2Miao Dong ¹Yihua Bai ¹Yuanjie Yang ^1,*

Author Affiliations

¹ School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China

² Southwest Institute of Technical Physics, Chengdu 610041, China

Figures & Tables

Fig. 1. Schematic of the experimental setup for detecting the topological charge of optical vortex with an IMI.

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Fig. 2. Far-field intensity patterns for vortex beams with different topological charges diffracted by (a) IMI and (b) MI with N=6. (a) and (b) are calculated by Eqs. (3) and (4), respectively.

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Fig. 3. Distinctions between the two methods with (c) MI and (f) IMI. (a) and (b) The phase distributions of vortex beams with l=1 and l=7, respectively. (d₁) and (d₂) are the corresponding local phase distributions obtained by MI for l=1 and l=7, respectively. (e₁) and (e₂) are the corresponding far-field intensity patterns, respectively. (g₁), (g₂), (h₁), and (h₂) are the same as (d₁), (d₂), (e₁), and (e₂) but for IMI.

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Fig. 4. Schematic overview of the setup for measuring OAM of the vortex beams.

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Fig. 5. Experimental results of the far-field intensity patterns corresponding to Fig. 2(a).

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Qi Zhao, Miao Dong, Yihua Bai, Yuanjie Yang. Measuring high orbital angular momentum of vortex beams with an improved multipoint interferometer[J]. Photonics Research, 2020, 8(5): 05000745.

Measuring high orbital angular momentum of vortex beams with an improved multipoint interferometer Download： 638次

Fig. 1. Schematic of the experimental setup for detecting the topological charge of optical vortex with an IMI.

Fig. 2. Far-field intensity patterns for vortex beams with different topological charges diffracted by (a) IMI and (b) MI with N=6. (a) and (b) are calculated by Eqs. (3) and (4), respectively.

Fig. 4. Schematic overview of the setup for measuring OAM of the vortex beams.

Fig. 5. Experimental results of the far-field intensity patterns corresponding to Fig. 2(a).

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Measuring high orbital angular momentum of vortex beams with an improved multipoint interferometer Download： 638次

Fig. 1. Schematic of the experimental setup for detecting the topological charge of optical vortex with an IMI.

Fig. 2. Far-field intensity patterns for vortex beams with different topological charges diffracted by (a) IMI and (b) MI with N=6. (a) and (b) are calculated by Eqs. (3) and (4), respectively.

Fig. 4. Schematic overview of the setup for measuring OAM of the vortex beams.

Fig. 5. Experimental results of the far-field intensity patterns corresponding to Fig. 2(a).

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