Enhancing the accuracy of rotational velocity measurement for vortex beams within the optimal ability of phase retrieval algorithm

• DOI: 10.3389/fphy.2023.1333427
• Publication Date: 2024-01-03T04:33:42Z
• Authors: Hongyang Wang; Zijing Zhang; Hao Yun; Hao Liu; Yuan Zhao
• Keywords: Accuracy and precision

The measurement of the rotational velocity using Doppler effect (RDE) a vortex beam is easily affected by atmospheric turbulence, leading to dispersed orbital angular momentum (OAM), and reduced accuracy. This study investigates optimal ability Gerchberg-Saxton (GS) phase retrieval algorithm compensate for optical field enhance accuracy within range intrinsic parameters, such as number GS iterations, extrinsic turbulence intensity properties. Through detailed theoretical simulation analyses, we demonstrate outstanding effectiveness in improving Simulations conducted system-target distance z S-T = 500 m show 29.88% improvement 1.03-fold increase spectral signal-to-noise ratio (SSNR) range. It showcases advantages that set it apart from other methods. reveals threshold significantly accuracy, providing valuable insights precision measurements velocities free-space applications.