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

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)
Authors:
; ;  [1] ;  [2]
  1. P N Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
  2. National Research Nuclear University ''MEPhI'' (Russian Federation)
Publication Date:
OSTI Identifier:
22373323
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 44; Journal Issue: 12; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DEFORMATION; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; LASERS; LAYERS; LIQUID CRYSTALS; MODULATION; NOISE; PHOTON BEAMS