2015/09/30 by Evgeniy Tikhonov, Tikhonov, E. A., A. K. Lyamets +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #Optical Polarization and Ellipsometry #Optical Systems and Laser Technology #Optical and Acousto-Optic Technologies #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.1509.09191
openalex publication_date 2015/09/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Proposed, justified and tested measuring of beam spatial coherence, based on the detection of an interference visibility of the equal to intensity of beam replicas emerging under reflection from the rotated plane-parallel plate. The method consists in measuring the interference contrast at the simultaneous change of the longitudinal path difference and transverse shift of named replicas. Accurate measurement of the angle of rotated plate and the amplitude distribution of interferential minimaxes allows to determine the width of the beam spatial coherence. Spatial coherence of some types of multimode lasers has been measured by the method. Keywords: coherence measurements, interference in 2 move apart beam, rotable interferometer