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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
P. Kumar and N. K. Nishchal 
Corresponding Authors:
N. K. Nishchal 
DOI #:
https://doi.org/10.1364/AO.58.006827 
Title:
Self-referenced spiral interferogram using modified lateral shearing Mach-Zehnder interferometer 
Journal:
Applied Optics  
Year:
2019 
Volume:
58 
Page:
6827 
Keywords:
Mach-Zehnder interferometer, interferogram 
Abstract:
Interference of a vortex beam with a reference beam can specify the amount of orbital angular momentum carried by the beam. In this study, we demonstrate that the vortex beam produces spiral-shaped interference fringes when interfered with its converging and laterally displaced copy. The analysis will help determine the topological charge, especially its sign. Theoretical description, including intensity and phase profile, has been presented. It is expected that the demonstrated technique would find application in diverse areas, such as in the fields of optical communication and spiral interferometry. 
Entered by:
Venkata Dantham on 2020-08-03 
 
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