Mitigation of lateral misalignment in the optical set-up for the generation of perfect vortex beam by the radial shearing self-interferometric (RSSI) technique

Traditionally, interference patterns play an important role in determining the sign and magnitude of the orbital angular momentum (OAM) of the vortex beam. However, we demonstrate the importance of interference patterns in the identification and mitigation of lateral misalignment in the optical set-...

Full description

Saved in:
Bibliographic Details
Published in:Journal of modern optics 2023-01, Vol.70 (2), p.100-113
Main Authors: Gangwar, Swati, Dwivedi, Rajeev, Jaiswal, V. K., Mehrotra, Ranjana, Saha, Shibu, Sharma, Parag
Format: Article
Language:English
Subjects:
Algorithms
Angular momentum
Electron beams
Image processing
Interference
Interferometry
lateral misalignment
Misalignment
Perfect vortex beam
radial shearing self-interferometric technique
Self alignment
Shearing
Splitting
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Traditionally, interference patterns play an important role in determining the sign and magnitude of the orbital angular momentum (OAM) of the vortex beam. However, we demonstrate the importance of interference patterns in the identification and mitigation of lateral misalignment in the optical set-up, studied through the Radial Shearing Self-Interferometric (RSSI) technique. A splitting of the interference pattern of the perfect vortex beam (PVB) was observed with the introduction of lateral misalignment. These interference patterns proved to be instrumental in the identification of minute misalignment (micron level) in the optical set-up. The splitting in the interference patterns has been detected through image processing and an algorithm for automating the mitigation process has been proposed. The technique could prove to be a step towards self-aligning optical set-ups.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2023.2192812