Phase recovery with intensity and polarization correlation

Sarkar, Tushar; CHANDRA, SOURAV; Singh, Rakesh Kumar

doi:10.1016/bs.po.2023.01.001

Cited by 11 publications

(2 citation statements)

References 187 publications

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“…Several recent works have extended the use of higher-order correlations with unique features and advantages in imaging. Some of these interests are in holography [1][2][3], x-ray crystallography [4][5][6], terahertz [7], imaging through turbulence [8][9][10], atomic imaging [11,12], ghost diffraction (GD), ghost imaging (GI) [13][14][15][16][17][18][19][20], etc. Among them, GD is a novel alluring method to obtain the diffraction pattern of an object from non-local spatial correlations between two light beams.…”

Section: Introductionmentioning

confidence: 99%

Phase retrieval in inverse ghost diffraction using Sagnac interferometer

Gautam,

Chandra,

Singh

2024

J. Opt.

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Ghost diffraction involves the use of non-local spatial correlations to image objects with light, which has not interacted with them. Here, we propose and experimentally demonstrate a new technique for first-order correlation measurement in ghost diffraction and retrieval of two-dimensional phase objects from inversion of the experimentally measured two-point complex correlation function in a first order interferometer. The ghost diffraction scheme is experimentally implemented by a specially designed experimental setup wherein one of the orthogonal polarization components of the transversely polarized light interacts with the object and the other polarization component of the light remains intact and directly reaches the detector. The Fourier spectrum of the object is encoded into the two-point spatial correlation of these two orthogonal polarization components which is experimentally detected in an interferometer with a radial shearing in the Sagnac geometry. We experimentally demonstrated imaging of spatially varying phase objects and results are presented for three different cases.

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Section: Introductionmentioning

confidence: 99%

Phase retrieval in inverse ghost diffraction using Sagnac interferometer

Gautam,

Chandra,

Singh

2024

J. Opt.

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“…In the case of non-uniform polarization, the polarization state may vary in space over the beam's profile with various features, such as periodic variations [58][59][60], circular symmetry [61], or other complex structures [62][63][64]. Many intriguing properties have been elucidated for such non-uniformly polarized beams, particularly as they propagate in free space, random media, or through optical systems [65,66]. Consequently, substantial efforts have been dedicated to comprehensively characterize them and to design and experimentally generate beams with diverse states of coherence and polarization over the past few years.…”

Section: Introductionmentioning

confidence: 99%

Effect of Polarization on Cross-Spectral Density Matrix

Gautam,

Naik,

Narayanamurthy

et al. 2024

Photonics

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Coherence-polarization properties of different beams are experimentally measured in the far-field from the source and results are presented for incoherent sources with three different polarization features, such as unpolarized, diagonally polarized, and spatially depolarized. These results highlight the role of polarization tailoring on far-field coherence-polarization properties of the incoherent vector source. The effect of polarization on far-field coherence is analyzed using a beam cross-spectral density (CSD) matrix, and the role of polarization tailoring on the CSD matrix is demonstrated. Two-dimensional spatial distributions of all four elements of the CSD matrix are experimentally realized using a field-based interferometer with Sagnac geometry in combination with a four-step phase-shifting technique.

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Pilot-assisted beam and correlation to recover information through scattering media [Invited]

Sarkar,

Singh

2024

Appl. Phys. B

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Phase recovery with intensity and polarization correlation

Cited by 11 publications

References 187 publications

Phase retrieval in inverse ghost diffraction using Sagnac interferometer

Phase retrieval in inverse ghost diffraction using Sagnac interferometer

Effect of Polarization on Cross-Spectral Density Matrix

Pilot-assisted beam and correlation to recover information through scattering media [Invited]

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