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P‐177: Principle and Design of a Binary Phase Modulator Based on the Electro‐Optic Effect for Speckle Reduction in Laser Displays
Author(s) -
Tong Zhaomin
Publication year - 2016
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.11075
Subject(s) - speckle pattern , optics , materials science , reduction (mathematics) , phase modulation , phase (matter) , modulation (music) , voltage , binary number , laser , detector , crystal (programming language) , optoelectronics , physics , computer science , phase noise , mathematics , geometry , arithmetic , quantum mechanics , acoustics , programming language
A longitudinal binary phase modulator (LBPM) based on the KTa 1‐x Nb x O 3 (KTN) crystal is proposed for laser speckle reduction. The actuation voltages are applied by two series of transparent electrodes consisted of interdigitated fingers. By sequentially changing the phase modulation depth of the LBPM pixel during the detector integration time, speckle reduction can be achieved. Due to the large Kerr coefficient of the KTN crystal, the LBPM is expected to work at low voltage levels.