Registration Number
0211U005248,
0109U004509
, R & D reports
Title
Investigation of stability and recognition technique of the signals based on optical vortices in the beams propagation in non-homogeneous media.
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Head
Soskin Marat Samuilovich,
Registration Date
12-03-2011
Organization
Institute of physics NASU
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In this paper we analyzed the effects that occur in the spectrum of the orbital angular momentum of an optical beam at the elementary perturbations (a parallel shift and the angular deviation). Shown, are formed as a discrete spectrum of the orbital-angular momentum (OAM) component in the projection beam axis, even for a Gaussian beam with zero OAM own. Established that the power spectrum of the OAM components, which is the projection of the OAM of the beam deflection, allows the amount to the same value OAM, in contrast to the geometric projection of the vector. We consider the encoding of the signal, which is based on combining the signal beam, which contains one or more optical vortices with different topological indices and the reference Gauss beam. Between the signal and reference beam is given by the shift in frequency. The possibility of isolating the reference and signal beam at the stage of receiving the signal due to frequency differences. As a basic coding method is selected combined beam, which includes a constant part (referent), and information, and information of the encoded orbital angular momentum of the beam. Proposed several methods for processing real-time signal CCD cameras, which allow you to separate the fixed and variable components. Address the technical issues of processing this kind of matrices, the analysis of possible methods for improving signal to noise ratio. Under laboratory conditions, was carried out implementation of the combined beam with a frequency-shifted reference component and the reception and decoding of the signal in the case of distortion of the beam on a phase-inhomogeneous mask.
Product Description
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Васильєв Василь Ігоревич
Васнєцов Михаїл Вікторович
Пасько Валерій Аркадієвич
Поневчинський Владіслав Вікторович
Соскін Марат Самуїлович
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2020-04-02
