Выходит 12 номеров в год
ISSN Печать: 0040-2508
ISSN Онлайн: 1943-6009
Indexed in
MODULATION OF OPTICAL RADIATION BY MAGNETOMECHANICAL OSCILLATIONS IN THREE-LAYER COMPOSITE STRUCTURES
Краткое описание
A high efficiency of light modulators with the Faraday rotation effect can he achieved using magneto-optical crystals. Substantially new characteristics of such modulators can he obtained using magnetomechanical resonance in magneto-optical crystals. However, the use of a single magneto-optical crystal is not efficient enough. The paper discusses the features of the optical radiation modulation due to the Faraday effect-excited magnetomechanical vibrations in the thickness of the substrate-magnetooptic crystal-ferrite composite structure. The frequency dependences for the amplitude and the initial phase of a variable Faraday-effect component were obtained. An additional enhancement of mechanical stress in the crystal under magnetomechanical resonance arises when the magneto-optical crystal is placed between the magnetopassive substrate and magnetostrictive ferrite. The additional increase of the variable Faraday-effect component can reach 50 % compared with a single-layer structure. It is shown that for the modulator under consideration the initial phase delay of the variable Faraday- effect component to the values of 30−60° at the resonance instant is characteristic. The resonance dependence of the initial phase shift for the variable Faraday-effect component is characterized by the absolute stability relatively to the variable magnetic field amplitude and is determined by characteristics of magnetomechanical oscillations in the structure.
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Linchevskyi, I.V. and Petrishchev, O.N., Determination of material constants for magneto-optical crystals using the Faraday effect under magnetomechanical resonance conditions.
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Linchevskyi, I.V., Influence of magnetomechanical resonance on the light polarization in magneto-optical crystals.
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Arkhipsky, A.O. and Linchevsky, I.V., Self-excited oscillator based on magneto-optical crystal.
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Landau, L.D. and Lifshits, E.M., Theory of elasticity.
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Bondarenko, А.А., Kutsenko, G.V., and Ulitko, A.F., Amplitudes and phases of longitudinal oscillations of piezoceramic rods taking into account the variable mechanical Q.
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Bozort, R.M., Ferromagnetism.