Speckle noise suppression using a helix-free ferroelectric liquid crystal cell

Journal Article · Wed Dec 31 00:00:00 EST 2014 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2014V044N12ABEH015587· OSTI ID:22373323

Andreev, A L; Andreeva, T B; Kompanets, I N ^[1]; Zalyapin, N V ^[2]

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1. P N Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
2. National Research Nuclear University ''MEPhI'' (Russian Federation)

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. (liquid crystal devices)

• OSTI ID: 22373323
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 44, Issue 12; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DEFORMATION
ELECTRIC FIELDS
FERROELECTRIC MATERIALS
LASERS
LAYERS
LIQUID CRYSTALS
MODULATION
NOISE
PHOTON BEAMS