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Generation of half-pearcey laser beams by a spatial light modulator
A.A. Kovalev, V.V. Kotlyar, A.P. Porfirev

 

Image Processing Systems Institute, Russian Academy of Sciences,

Samara State Aerospace University

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Full text of article: Russian language.

DOI: 10.18287/0134-2452-2014-38-4-658-662

Pages: 658-662.

Abstract:
With use of a liquid crystal phase-only spatial light modulator, we generate form-invariant Half-Pearcey laser beams (HP-beams), which were recently proposed by the present authors [Computer Optics, v. 38, no. 2 (2014)]. It is experimentally shown that upon propagation the HP-beams preserve their shape up to a scale and rotate by 180 degrees. These beams have the ability to auto-focus and reconstruct their intensity pattern after partial distortion by an amplitude defect (property of self-healing). The amplitude and phase of the HP-beam were encoded with the modified two-phase algorithm. Ignoring the amplitude and using only the phase leads to greater distortions of the HP-beam comparing with the two-phase encoding algorithm.

Key words:
Half-Pearcey laser beam, liquid crystal spatial light modulator, two-phase encoding algorithm, encoding of the complex amplitude.

Citation:
Kotlyar VV, Kovalev AA, Porfirev AP. Hermite-gaussian laser beams with orbital angular momentum. Computer Optics 2014; 38(4): 651-657. DOI: 10.18287/0134-2452-2014-38-4-651-657.

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