Folded interferometer to measure coherence–polarization matrix

S Chandra, A Gautam, RK Singh - Optics Letters, 2024 - opg.optica.org
We present and experimentally demonstrate a new, to the best of our knowledge, technique
to quantitatively measure coherence–polarization (BCP) matrix with correlations of only two …

Imaging of polarimetric-phase object through scattering medium by phase shifting

L Chen, Z Chen, RK Singh, J Pu - Optics Express, 2020 - opg.optica.org
Light propagating through a scattering medium generates a random field, which is also
known as a speckle. The scattering process hinders the direct retrieval of the information …

Recording of incoherent vector holograms using elements of the spatial cross-spectral density matrix

A Gautam, TS Athira, DN Naik, R Singh… - Optics and Lasers in …, 2023 - Elsevier
We present an approach to record incoherent vector holograms using a highly stable field-
based interferometer employing radial shearing. The vector holograms are recorded as the …

Measuring complex correlation matrix of partially coherent vector light via a generalized hanbury brown–twiss experiment

Z Dong, Z Huang, Y Chen, F Wang, Y Cai - Optics Express, 2020 - opg.optica.org
We introduce an effective method for measuring the spatial distribution of complex
correlation matrix of a partially coherent vector light field obeying Gaussian statistics by …

Analysis of polarization speckle for imaging through random birefringent scatterer

A Roy, RK Singh, MM Brundavanam - Applied Physics Letters, 2016 - pubs.aip.org
Propagation of a coherent light through an anisotropic random medium generates randomly
polarized field, known as polarization speckle. In this paper, an experimental technique is …

Measurement of coherence-polarization matrix from a single-frame recording

S Chandra, RK Singh - Optics and Lasers in Engineering, 2025 - Elsevier
Abstract Characterization of statistical properties of a vector source requires fast and efficient
measurement of all four elements of the square coherence-polarization (BCP) matrix. Here …

Controlled modulation of depolarization in laser speckle

A Roy, RK Singh, MM Brundavanam - Optics Letters, 2017 - opg.optica.org
A new technique based on superposition of two speckle patterns is proposed and
demonstrated for controlled modulation of the spatial polarization distribution of the resultant …

Recovery of polarimetric parameters from non-imaged laser-speckle

D Singh, Z Chen, J Pu, RK Singh - Journal of Optics, 2018 - iopscience.iop.org
Propagation of polarized monochromatic light through inhomogeneous media generates a
noisy pattern known as a laser speckle. The speckle pattern obscures recovery of the …

Structuring Stokes correlation functions using vector-vortex beam

V Kumar, A Anwar, RP Singh - Journal of Optics, 2017 - iopscience.iop.org
Higher order statistical correlations of the optical vector speckle field, formed due to
scattering of a vector-vortex beam, are explored. Here, we report on the experimental …

Dynamical charge inversion of polarization correlation vortex in propagating vector speckle field

HJ Pandit, V Kumar, RP Singh - Journal of Optics, 2022 - iopscience.iop.org
A study on first-order polarization correlation in propagating vector speckle fields is carried
out. Vector speckle field, generated by scattering of Poincare beam, is propagated through a …