Qimeng Sha, Weijie Wang, Tong Liu, Zhengliang Liu, Song Qiu, Yuan Ren. Analysis of rotational velocity measurement accuracy and signal-to-noise ratio of balanced detection based on vortex beam (Invited)[J]. Infrared and Laser Engineering, 2021, 50(9): 20210616

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- Infrared and Laser Engineering
- Vol. 50, Issue 9, 20210616 (2021)

Fig. 1. Design schematic of homodyne detection experiment

Fig. 2. Experimental optical path of homodyne detection

Fig. 3. Design schematic of balanced detection experiment

Fig. 4. Experimental optical path of balanced detection

Fig. 5. Rotational velocity spectrum of homodyne detection

Fig. 6. Rotational velocity spectrum of balanced detection

Fig. 7. Relative error changes with rotational velocity

Fig. 8. Analysis of SNR

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