Crystal-based device for combining light beams

Kuznetsov, V. O.; Faleiev, Dmitriy; Savin, E. Z.; Lebedev, V. M.

doi:10.1364/ol.34.002856

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…The second wedge has thickness d 2 (at x = 0) and its optic axis is in the xy plane and forms an angle of 45 • with respect to the first one. It is well known that, when an arbitrarily polarized beam impinges onto the separation surface of two uniaxial crystals with their optic axes arbitrarily oriented, up to four refracted (and four reflected) beams are produced [17][18][19]. Now we will derive the propagation directions and the corresponding amplitudes of the four plane waves that are produced when an arbitrary polarized monochromatic plane wave impinges orthogonally on a DWD.…”

Section: Preliminariesmentioning

confidence: 99%

Longitudinal polarization periodicity of unpolarized light passing through a double wedge depolarizer

et al. 2012

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Abstract:The polarization characteristics of unpolarized light passing through a double wedge depolarizer are studied. It is found that the degree of polarization of the radiation propagating after the depolarizer is uniform across transverse planes after the depolarizer, but it changes from one plane to another in a periodic way giving, at different distances, unpolarized, partially polarized, or even perfectly polarized light. An experiment is performed to confirm this result. Measured values of the Stokes parameters and of the degree of polarization are in complete agreement with the theoretical predictions.

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Section: Preliminariesmentioning

confidence: 99%

Longitudinal polarization periodicity of unpolarized light passing through a double wedge depolarizer

et al. 2012

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“…Since, within our approximations, both the phases δ 1 and δ 2 are linear functions of the x coordinate, this equation shows that the output field consists of four linearly polarized plane waves [29,30]. Two of these waves have polarizations parallel to that of the input field (first term of the right hand side of equation ( 41)) and propagate along different directions, so that they interfere to produce a fringe pattern in the irradiance profile, with period L x .…”

Section: Totally and Uniformly Polarized Input Beammentioning

confidence: 95%

“…The optic axis of the second wedge is parallel to the bisector of the x and y axes. When a plane wave impinges perpendicularly to the input face of a DWD, the ordinary and extraordinary components of the field propagate through the first wedge and both of them split into two new ordinary and extraordinary components in the second one [29,30]. Two of these components propagate, after the DWD, following the same direction as the incident plane wave but with different phases and orthogonal polarizations.…”

Section: Double-wedge Depolarizermentioning

confidence: 99%

Partially coherent electromagnetic beams propagating through double-wedge depolarizers

Sande¹,

Piquero²,

Santarsiero³

et al. 2014

J. Opt.

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The irradiance and polarization characteristics of quasi-monochromatic partially coherent electromagnetic beams are analyzed when they propagate after passing through a deterministic linear optical element, i.e., an optical element that can be represented by a Jones matrix. A class of such optical elements, which includes double-wedge depolarizers and polarization gratings, is defined and studied in detail. Analytical expressions are obtained for the case of double-wedge depolarizers and examples are given for an incident Gaussian Schell-model beam. For such an input beam, the effects on the irradiance and degree of polarization of the field propagating beyond the optical element are investigated in detail. A rich variety of behaviors is obtained by varying the beam size, coherence width and polarization state of the input field. The results not only provide a mathematical extension of well-known results to the domain of partial coherence, but they also exemplify mixing between coherence and polarization, which is, of course, not possible if, for example, fully spatially coherent fields are analyzed.

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“…If a plane wave impinges perpendicularly to the input face of the DW with arbitrary state of polarization, e.g., linearly polarized with π/4 azimuth, four field components can be identified at the output [80,[131][132][133][134]: two plane waves propagating along the same direction as the incident wave but with different phases and orthogonal polarization, and two plane waves, also having mutually orthogonal polarization, that propagate along slightly tilted directions. The effect of the superposition of such waves is a modulation of the state of polarization of the field across the exit plane of the device.…”

Section: Double Wedgementioning

confidence: 99%

Synthesis and characterization of non-uniformly totally polarized light beams: tutorial

Piquero¹,

Martı́nez-Herrero²,

Sande³

et al. 2020

J. Opt. Soc. Am. A

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Polarization of a light beam is traditionally studied under the hypothesis that the state of polarization is uniform across the transverse section of the beam. In such a case, if the paraxial approximation is also assumed, the propagation of the beam reduces to a scalar problem. Over the last few decades, light beams with spatially variant states of polarization have attracted great attention, due mainly to their potential use in applications such as optical trapping, laser machining, nanoscale imaging, polarimetry, etc. In this tutorial, an introductory treatment of nonuniformly totally polarized beams is given. Besides a brief review of some useful parameters for characterizing the polarization distribution of such beams across transverse planes, from both local and global points of view, several methods for generating them are described. It is expected that this tutorial will serve newcomers as a starting point for further studies on the subject.

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Crystal-based device for combining light beams

Abstract: Using a monoprism of anisotropic crystal with special configuration, we can combine between two and four laser beams for them to propagate in a single direction. This method is simpler than previously used ones.

Cited by 3 publications

References 2 publications

Longitudinal polarization periodicity of unpolarized light passing through a double wedge depolarizer

Longitudinal polarization periodicity of unpolarized light passing through a double wedge depolarizer

Partially coherent electromagnetic beams propagating through double-wedge depolarizers

Synthesis and characterization of non-uniformly totally polarized light beams: tutorial

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