Investigating the measurement of target rotate speed at off-axis incidence of vortex beam under different topological charge

Hadiqa Abdugopur; Wen-Ke Xie; Jing Liu; Min Gao

doi:10.1117/12.3050321

18 November 2024 Investigating the measurement of target rotate speed at off-axis incidence of vortex beam under different topological charge

Hadiqa Abdugopur, Wen-Ke Xie, Jing Liu, Min Gao

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Proceedings Volume 13398, Fourth International Conference on Optics and Communication Technology (ICOCT 2024); 1339809 (2024) https://doi.org/10.1117/12.3050321
Event: Fourth International Conference on Optics and Communication Technology (ICOCT 2024), 2024, Nanjing, China

Abstract

The topological charge of the vortex beam is directly related to beam size, transmission robustness, and influence degree of turbulence. Moreover, it plays an important role in measuring the target’s rotation speed of the rotational Doppler effect. To effectively address this issue, in this work, coherent synthesized vortex beams with different topological charges were produced by using a laser array. A systematic experimental study on the coherent synthesized vortex beam under different rotation speeds in the context of off-axis incidence was carried out. From the acquired research results, important experimental verification to the measurement of the target’s rotation speed due to the rotational Doppler effect can be provided. This outcome further confirms the impact of the topological charge on the measurement accuracy.

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Hadiqa Abdugopur, Wen-Ke Xie, Jing Liu, and Min Gao "Investigating the measurement of target rotate speed at off-axis incidence of vortex beam under different topological charge", Proc. SPIE 13398, Fourth International Conference on Optics and Communication Technology (ICOCT 2024), 1339809 (18 November 2024); https://doi.org/10.1117/12.3050321

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KEYWORDS

Doppler effect

Demodulation

Control systems

Error analysis

Optical simulations

Physical coherence

Angular velocity

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