Speckle noise suppression using a helix-free ferroelectric liquid crystal cell
| Autor: | A. L. Andreev, I. N. Kompanets, N. V. Zalyapin, T B Andreeva |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Condensed matter physics business.industry Phase (waves) Statistical and Nonlinear Physics Speckle noise Laser Ferroelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Crystal Optics law Liquid crystal Electrical and Electronic Engineering business Phase modulation Noise (radio) |
| Zdroj: | Quantum Electronics. 44:1136-1140 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2014v044n12abeh015587 |
| Popis: | We have studied the method for suppressing speckle noise in patterns produced by a laser based on a fast-response electro-optical cell with a ferroelectric liquid crystal (FLC) in which helicoid is absent, i.e., compensated for. The character of smectic layer deformation in an electric field is considered along with the mechanism of spatially inhomogeneous phase modulation of a laser beam passing through the cell which is accompanied by the destruction of phase relations in the beam. Advantages of a helix-free FLC cell are pointed out as compared to helical crystal cells studied previously. |
| Databáze: | OpenAIRE |
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