Polarization singularities in partially coherent combined beams

Felde, Ch. V.; Chernyshov, A. A.; Bogatyryova, G. V.; Polyanskii, Peter V.; Soskin, M. S.

doi:10.1134/s002136400819003x

Cited by 39 publications

(19 citation statements)

References 10 publications

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“…Namely, one observes two zeroes of the degree of polarization at the each side of the central optical vortex that are the signs of two U contours. Moreover, experiment has proved typical conical vicinity of U contours recently predicted and observed in paper[61], which are reliable sign of true singularity of any kind, in contrast to local minimum.Another limiting case (completely mutually coherent components) for 1 ll   (approximately 0.05) is illustrated inFig. 18.…”

supporting

confidence: 67%

Optical Measurements: Polarization and Coherence of Light Fields

Angelsky¹,

Polyanskii²,

Mokhun³

et al. 2012

Modern Metrology Concerns

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Important part of this review is devoted to description of feasibilities for experimental measuring of coherence by measuring of spatial polarization distributions of www.intechopen.com Modern Metrology Concerns 264 inhomogeneously polarized fields. We represent the newest metrological tool connected with novel concept of optical currents (optical flows). Namely, we show that some intimate characteristics of complex optical fields with arbitrary degree of spatial coherence and arbitrary degree of polarization may be "deciphered" indirectly, by observation of the influence of such fields on embedded micto-and nanoparticles. This original metrological approach seems to be prospective for development of so-called optical traps and tweezers for manipulation of isolated particles of micro-and nanoscales. Separate section of the Chapter is devoted to application of local Stokes-polarimetry in diagnostics of biological tissues, in the context of early (pre-clinical) diagnostics of some widespread diseases. We represent both experimental and data processing techniques leading to high-sensitive and reliable diagnostics. All considered metrological approaches and techniques are original, generated by recently by the members of our team. Some prospects of further investigations in the direction represented in this Chapter, as well as necessity and possible ways for overcoming some present shortcomings of optical metrology in the field of coherence and polarization, are outlined in the last section.

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supporting

confidence: 67%

Optical Measurements: Polarization and Coherence of Light Fields

Angelsky¹,

Polyanskii²,

Mokhun³

et al. 2012

Modern Metrology Concerns

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“…With slightly increasing decentered parameter to b¼0.5015 in Fig. 1(b) C-point 1 moves to the L-line at (14.066, À 8.229), and collides with it, resulting in the creation of a V-point marked ''%'', at which s 1 ¼s 2 ¼ s 3 ¼0, and the degree of polarization P¼0, sometimes also called the U-singularity [5,6].…”

Section: Changes In Composite Spectral Stokes Singularities By Varyinmentioning

confidence: 97%

“…Berry and Dennis studied polarization singularities in isotropic random vector wavefields [4], and reinterpreted them as loci of photon spin 1 (C-lines) and 0 (L-lines). The vector singularities, including U (unpolarized) lines, P (completely polarized) points of incoherently combined beams in the paraxial approximation were analyzed by Felde et al [5] and Chernyshov et al [6]. Schoonover and Visser examined the state of polarization of strongly focused radially polarized fields and observed the collision of a C-and L-lines, which results in a V-point [7].…”

Section: Introductionmentioning

confidence: 98%

Composite spectral Stokes singularities in coherent and incoherent superpositions of partially coherent nonparaxial vortex beams

Luo

Lü

Yun-Hai

et al. 2012

Optics & Laser Technology

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“…The present work only considered coherent beams, but the apparatus can be modified for investigating the patterns of partially polarized beams. 40,41 By inserting birefringent crystals anywhere in the path of the light, we can delay one polarization component relative to the other by amounts comparable to the coherence time of the beam of light. The apparatus can also be used to access a larger multidimensional space of polarization and spatial modes of single photons.…”

Section: Discussionmentioning

confidence: 99%

Preparation of Poincaré beams with a same-path polarization/spatial-mode interferometer

Khajavi

Galvez

2015

Opt. Eng

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Abstract. We present a same-path polarization interferometer that uses two spatial light modulators to encode the most general type of Poincaré beam. We demonstrate this design by presenting new results on the encoding of symmetric C-point polarization singularities using spatial modes with high-order topological charges. We also present new results on composite C-points. These are cases where there are multiple C-points in a single beam obtained by combining two modes with composite optical vortices in orthogonal states of polarization. The measurements show good agreement with the simulations.

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Polarization singularities in partially coherent combined beams

Cited by 39 publications

References 10 publications

Optical Measurements: Polarization and Coherence of Light Fields

Optical Measurements: Polarization and Coherence of Light Fields

Composite spectral Stokes singularities in coherent and incoherent superpositions of partially coherent nonparaxial vortex beams

Preparation of Poincaré beams with a same-path polarization/spatial-mode interferometer

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