Optimized Measurement of Optical Rotational Doppler Shift Using Dual Fourier Analysis

Ruoyu Tang; Song Qiu; Tong Liu; Xiuqian Li; Zhengliang Liu; Yuan Ren

doi:10.3788/AOS221734

Journals >Acta Optica Sinica >Volume 43 >Issue 7 >Page 0726002 > Article

Acta Optica Sinica
Vol. 43, Issue 7, 0726002 (2023)

Optimized Measurement of Optical Rotational Doppler Shift Using Dual Fourier Analysis

Ruoyu Tang¹, Song Qiu¹, Tong Liu¹, Xiuqian Li²..., Zhengliang Liu¹ and Yuan Ren^3,*|Show fewer author(s)

Author Affiliations

¹Department of Aerospace Science and Technology, Space Engineering University, Beijing 101416, China

²Office of Academic Affairs, Space Engineering University, Beijing 101416, China

³Department of Basic Course, Space Engineering University, Beijing 101416, China

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DOI: 10.3788/AOS221734 Cite this Article Set citation alerts

Ruoyu Tang, Song Qiu, Tong Liu, Xiuqian Li, Zhengliang Liu, Yuan Ren. Optimized Measurement of Optical Rotational Doppler Shift Using Dual Fourier Analysis[J]. Acta Optica Sinica, 2023, 43(7): 0726002 Copy Citation Text

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Fig. 1. Sketch map of lateral displacement of vortex beam optical axis

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Simulation results of OAM decomposition. (a) Superposition-mode LG beam with l=±20 and d=5 mm; (b) OAM spectrum of superposition-mode LG beam with l=±20 and d=5 mm; (c) superposition-mode LG beam with half of it missing for l=±20; (d) OAM spectrum of superposition-mode LG beam with half of it missing for l=±20

Fig. 2. Simulation results of OAM decomposition. (a) Superposition-mode LG beam with

l = \pm 20

and

d = 5 m m

; (b) OAM spectrum of superposition-mode LG beam with

l = \pm 20

and

d = 5 m m

; (c) superposition-mode LG beam with half of it missing for

l = \pm 20

; (d) OAM spectrum of superposition-mode LG beam with half of it missing for

l = \pm 20

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Fig. 3. Experimental setup of measurement of RDE

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Fig. 4. Light intensity distributions collected by CCD (

l = \pm 20

). (a) Intensity distribution of holonomic vortex beam with impure mode; (b) intensity distribution of nonholonomic vortex beam

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Fig. 5. Results of dual Fourier analysis of signal by using impure optical vortex. Primary frequency spectra at (a) ω=30 Hz, (c) ω=40 Hz, and (e) ω=50 Hz; secondary frequency spectra at (b) ω=30 Hz, (d) ω=40 Hz, and (f) ω=50 Hz

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Fig. 6. Results of dual Fourier analysis of signal by using vortex beam with lateral displacement. Primary frequency spectra at (a) ω=30 Hz, (c) ω=40 Hz, and (e) ω=50 Hz; secondary frequency spectra at (b) ω=30 Hz, (d) ω=40 Hz, and (f) ω=50 Hz

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Fig. 7. Results of dual Fourier analysis of signal by using vortex beam with half of it missing. Primary frequency spectra at (a) ω=30 Hz, (c) ω=40 Hz, and (e) ω=50 Hz; secondary frequency spectra at (b) ω=30 Hz, (d) ω=40 Hz, and (f) ω=50 Hz