An experimental technique for measuring radial coherence

Abstract

Coherence refers to correlations between field vibrations at two separate points in degrees of freedom such as space, time, and polarisation. In the context of space, coherence theory has been formulated between two transverse positions which can be described either in the cartesian coordinates or in the cylindrical coordinates. When expressed in cylindrical coordinates, spatial coherence is described in terms of azimuthal and radial coordinates. The description of spatial coherence in radial degree of freedom has been formulated only recently in JOSA A 40, 411 (2023). In the present article, we demonstrate an efficient experimental technique for measuring radial coherence, and we report measurement of radial coherence of two different types of radially partially coherent optical fields.

9 pages, 3 figures

References in corpus (4)

• A unified matrix representation for spin and orbital angular momentum in partially coherent beams
• Experimental demonstration of structural robustness of spatially partially coherent fields in turbulence
• Efficient generation of propagation-invariant spatially-stationary partially coherent fields
• Modified Mach Zehnder interferometer for spatial coherence measurement