Acousto-optic gyrotropic-crystal-based modulator with a rotating polarisation vector. (March 2017)

• Record Type: Journal Article
• Authors: Kotov, V.M.; Averin, S.V.; Kotov, E.V.; Voronko, A.I.; Tikhomirov, S.A.
• Is Part Of: Quantum electronics. Volume 47:Number 2(2017)
• Page Start: 135
• Page End: 139
• Publication Date: 2017-03
• Subjects: acousto-optic diffraction -- Bragg regime -- frequency shift -- amplitude modulation; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL16194
• Languages: English
• ISSNs: 1063-7818

Abstract

Abstract: We study the influence of ellipticity of gyrotropic-crystal eigenwaves on the output characteristics of an acousto-optic (AO) modulator based on the interferometer scheme. The schemes of AO modulators are considered, which provide the polarisation vector rotation frequency fn /2, where f is the frequency of the acoustic wave, and n is the integer. Preference is given to the scheme combining cascade and polarisation-independent diffraction. An experimental layout of the AO modulator operating at f = 44.5 MHz is described, the modulation frequency of the output laser light intensity being 89 MHz. The frequency of the electrical signal from the photodetector is equal to 179.5 MHz.