Phase singularities to polarization singularities

Ruchi, P Senthilkumaran, SK Pal - International Journal of …, 2020 - Wiley Online Library
Polarization singularities are superpositions of orbital angular momentum (OAM) states in
orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the …

Self-referenced interferometry for single-shot detection of vector-vortex beams

P Kumar, NK Nishchal, T Omatsu, AS Rao - Scientific Reports, 2022 - nature.com
Vector-vortex (VV) beams are of significant interest for various applications. There have
been substantial efforts toward developing a fast and efficient method for the …

Phase singularities to polarization singularities

P Senthilkumaran, SK Pal - International Journal of Optics, 2020 - search.proquest.com
Polarization singularities are superpositions of orbital angular momentum (OAM) states in
orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the …

Analysis of the wavefront aberrations based on neural networks processing of the interferograms with a conical reference beam

SN Khonina, PA Khorin, PG Serafimovich, AP Dzyuba… - Applied Physics B, 2022 - Springer
Recently, intelligent data analysis and neural networks are increasingly used to detect the
wavefront by interferograms and digital holograms. In this case, there is significant freedom …

Self-referenced interference of laterally displaced vortex beams for topological charge determination

P Kumar, NK Nishchal - Optics Communications, 2020 - Elsevier
The optical vortex beam having helical phasefront carries well-defined orbital angular
momentum (OAM) which can be specified by its topological charge (TC). This study …

Optical vortex interferometer: An overview of interferogram demodulation methods for dynamic phase measurement

J Dong, E Zhao, L Xie, Y Li, Z Tian, X Xie - Optics and Lasers in …, 2024 - Elsevier
Different interferogram demodulation methods of optical vortex interferometer (OVI) have
been proposed over the last two decades aiming at dynamic phase measurement. Taking …

High-precision micro-displacement measurement in a modified reversal shearing interferometer using vortex beams

H Gao, D Yang, X Hu, W He, Z Yang, Z Liu - Optics Communications, 2023 - Elsevier
We propose a novel micro-displacement measurement system that employs a modified
reversal shearing interference structure based on vortex beam interference. The micro …

Phase response optimization of a liquid crystal spatial light modulator with partially coherent light

P Kumar, NK Nishchal - Applied Optics, 2021 - opg.optica.org
This paper demonstrates a method to determine and calibrate the modulation characteristics
of a liquid crystal spatial light modulator (SLM) for on-axis phase response with partially …

Detection of vortex charge and beam displacement by wavefront division interferometry

K Chatterjee, RK Singh, R Jha - Applied Physics Letters, 2023 - pubs.aip.org
In this work, a wavefront division interferometry method for determining the topological
charge (l) of vortex beams (VB) is proposed and utilized for the detection of beam …

Topological charge identification of vortex beams through optical correlation

R Kumar, A Shikder, NK Nishchal… - IEEE Photonics …, 2023 - ieeexplore.ieee.org
Recently optical beams containing orbital angular momentum have gained considerable
attention due to their wide range of uses. In all the applications, accurate determination of …