New scanning technique for the optical vortex microscope

Augustyniak, Ireneusz; Popiołek-Masajada, Agnieszka; Masajada, Jan; Drobczyński, Sławomir

doi:10.1364/ao.51.00c117

Cited by 37 publications

(15 citation statements)

References 25 publications

(29 reference statements)

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“…In conclusion, let us discuss the possibility of observing OV generation in spun fibers, whose refractive index distribution does not strictly obey the law implied by (1). As has been pointed out [20], the perturbation of the refractive index in this case can be presented in the form:…”

Section: Generation Of L-charged Optical Vortices From a Gaussian Inputmentioning

confidence: 97%

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Generation of optical vortices in spun multihelicoidal optical fibers

Alexeyev

2012

Appl. Opt.

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We have theoretically studied long-period spun l-helicoidal fibers and their ability to generate singular beams from regular ones. On the basis of perturbation theory in the presence of degeneracy, applied to the scalar waveguide equation, we obtained the structure of coupled modes of such fibers and their spectra. It is shown that the coupled modes consist of the fields, which taken separately bear topological charges that differ by l units. We have numerically studied the process of the passage of a Gaussian beam through such a fiber and demonstrated that long-period l-helicoidal fibers have the ability to change-in a certain wavelength range-the topological charge of the incoming Gaussian beam by l units, generating in this way charge-l optical vortex.

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Section: Generation Of L-charged Optical Vortices From a Gaussian Inputmentioning

confidence: 97%

“…Fields, such as optical microscopy [1], astrophysics [2], and particle trapping [3], have benefited from using the concepts of singular optics [4]. The use of electromagnetic vortices and, in particular, optical vortices (OVs) [5], show great promise for information encoding and transfer [6,7].…”

Section: Introductionmentioning

confidence: 99%

Generation of optical vortices in spun multihelicoidal optical fibers

Alexeyev

2012

Appl. Opt.

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“…In the next step, the object is put in the sample plane, which coincides with the critical plane (or is very close to it). The critical plane is a plane where the vortex trajectory is perpendicular to the vortex lens shift [27,30,31]. The vortex point (i.e., the point where the phase is singular) is most sensitive at this location.…”

Section: Basic Phase Samplementioning

confidence: 99%

Analytical Model of the Optical Vortex Scanning Microscope with a Simple Phase Object

2017

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An analytical model of an optical vortex microscope, in which a simple phase object was inserted into the illuminating beam, is presented. In this microscope, the focused vortex beam interacts with an object and transmits the corresponding information to the detection plane. It was shown that the beam at the detection plane can be separated analytically into two parts: a non-disturbed vortex part and an object beam part. The intensity of the non-disturbed part spreads out over the center; hence, the small disturbance introduced by the object can be detected at the image center. A first procedure for recovering information about the object from this set-up was proposed. The theory was verified experimentally.

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“…The new concept was necessary to push the project of the OVSM ahead. In papers 29,30 the new scanning technique was proposed (Fig. 1).…”

Section: Optical Vortex Scanning Microscopementioning

confidence: 99%

Phase reconstruction of the focused Gaussian beam with optical vortex

2012

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In the previous paper the new scanning technique was proposed. The sample was illuminated by a focused laser beam with an optical vortex. The vortex was introduced to the laser beam by vortex lens. When shifting the vortex lens the optical vortex in the focused beam moves and scans the sample. In order to use this new scanning technique for microscopic imaging a method for the focused vortex beam phase reconstruction is necessary. In this paper a fast and accurate method for phase reconstruction of the focused vortex beam is investigated. It is shown that the propose method is accurate enough to explore even small optical vortex shifts inside the focused beam.

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New scanning technique for the optical vortex microscope

Cited by 37 publications

References 25 publications

Generation of optical vortices in spun multihelicoidal optical fibers

Generation of optical vortices in spun multihelicoidal optical fibers

Analytical Model of the Optical Vortex Scanning Microscope with a Simple Phase Object

Phase reconstruction of the focused Gaussian beam with optical vortex

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