Open AccessRotational Doppler-effect due to selective excitation of vector-vortex field in optical fiber
Author(s) -
V. V. G. Krishna Inavalli,
Nirmal K. Viswanathan
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.000448
Subject(s) - optics , physics , doppler effect , polarization (electrochemistry) , optical vortex , vortex , light beam , rotation (mathematics) , elliptical polarization , beam (structure) , linear polarization , laser , chemistry , geometry , mathematics , astronomy , thermodynamics
Experimental demonstration of rotational Doppler-effect due to direct and simultaneous excitation of orthogonal elliptically-polarized fundamental and vortex modes in a two-mode optical fiber is presented here. The rotation frequency and the trajectory of the zero-intensity point in the two-mode fiber output beam measured as a function of analyzer rotation matches with the S-contour of polarization singularity in the beam, identified via Stokes parameter measurement. The characteristics of the S-contour around the C-point in the output beam is also measured as a function of rotating Dove prism and half-wave plate - Dove prism combination to highlight the role of polarization modifying components on the observed rotational Doppler-effect of vector-vortex beams.