Synthesis of statistical properties of a randomly fluctuating polarized field

Vinu, R. V.; Singh, Rakesh Kumar

doi:10.1364/ao.54.006491

Cited by 18 publications

(10 citation statements)

References 33 publications

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“…In another work, it is theoretically predicted that the interference of two unpolarized fields can produce completely polarized and depolarized field depending on the spatial position [32]. It is also shown that the correlation of the polarization elements can be manipulated using a spiral phase plate (SPP) and by different holographic techniques [33][34][35]. In another recent development, generation of partially coherent beams with different complex degrees of coherence is demonstrated experimentally [36].…”

mentioning

confidence: 99%

Controlled modulation of depolarization in laser speckle

Roy¹,

Singh²,

Brundavanam³

2017

Opt. Lett.

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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 speckle. It is theoretically and experimentally demonstrated that controlled modulation of the spatial polarization distribution of laser speckle can be achieved by proper choice of the polarization states as well as the average spatial intensity of the constituent speckles. It is shown that the proposed technique is useful to generate different speckle patterns with sinusoidal variation in their degree of polarization, which can be tuned from zero to unity. This technique can find application in sensing, biomedical studies, and in determining the rotation of an electric field vector after passing through a scattering medium.

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confidence: 99%

Controlled modulation of depolarization in laser speckle

Roy¹,

Singh²,

Brundavanam³

2017

Opt. Lett.

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“…The GDH system exploits the wide-sense spatial stationarity of the scattered fields at the detector plane and implements the spatial averaging approach as a replacement of ensemble averaging in the execution of correlation of intensity fluctuations. In recent times, a significant number of research efforts in correlation-based imaging and characterization techniques utilizes the potential features of spatial statistical optics [41,43,[69][70][71][72][73][74], but the approach has only very few executions in ghost scenarios [29]. The utilization of spatial averaging provides the potential opportunity to develop the snapshot GDH system, where the single shot detection of two intensity distributions corresponding to the ghost diffraction fields are sufficient to retrieve the ghost correlation hologram, thereby the simultaneous quantitative phase and amplitude imaging.…”

Section: Discussion and Summarymentioning

confidence: 99%

Ghost Diffraction Holography: A Correlation Assisted Quantitative Tool for Complex Field Imaging and Characterization

Kumari¹,

Chen²,

Singh³

et al. 2023

Holography - Recent Advances and Applications

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The fascinating domain of ghost imaging has been a subject of interest in the fundamental and applied research for the last two decades with its promising applications in various imaging and characterization scenarios. In this chapter, we discuss the recently developed ghost diffraction holography (GDH) system with due emphasis on the capability of quantitative complex-field imaging in the ghost framework. The development of the unconventional correlation-assisted GDH technique by adopting the holography concept in ghost diffraction scheme is described, and the quantitative phase imaging capability is demonstrated in the microscopy. In addition, the technique exploits the spatial statistics of time-frozen recorded speckle intensity with snapshot detection in ghost framework, which could broaden the applications of the developed microscopy to real-time imaging of two- and three-dimensional biological samples with high resolution. Furthermore, we discuss demonstrated applications of the technique in the imaging various spatially varying complex-valued macroscopic and microscopic samples and the potential application of the technique in the recovery and characterization of orbital angular momentum modes encoded in spatially incoherent speckle field.

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“…Coherence singularities in propagating coherent and partially coherent optical fields have been studied [36][37][38][39]. In the recent past, technique for the controlled synthesis of coherence and polarization were investigated by making use of intensity correlations [40]. Also, first-order polarization correlation singularity and stokes field auto-correlation (fourth-order correlation) singularities were studied in the vector speckle far-field generated from the scattering of Poincare beam [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

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

Pandit¹,

Kumar²,

Singh³

2022

J. Opt.

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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 spherical and a cylindrical lens. The first-order polarization correlation was experimentally constructed from intensity images of vector speckle fields at various planes before and after the focal plane. We have shown with supporting experimental and simulation results that polarization correlation vortex experiences charge inversion while vector speckle field propagates through a cylindrical lens. The importance of this study relies on the fact that it provides insight into one of the important properties of light, i.e., the phase between the orthogonal polarization components, how it evolves as the optical field propagates through various optical components. This study could find application in optical data processing, imaging, sensing, speckle meteorology, phase unwrapping, optical communication, etc.

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Synthesis of statistical properties of a randomly fluctuating polarized field

Cited by 18 publications

References 33 publications

Controlled modulation of depolarization in laser speckle

Controlled modulation of depolarization in laser speckle

Ghost Diffraction Holography: A Correlation Assisted Quantitative Tool for Complex Field Imaging and Characterization

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

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