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Telecommunications and Radio Engineering

Выходит 12 номеров в год

ISSN Печать: 0040-2508

ISSN Онлайн: 1943-6009

SJR: 0.185 SNIP: 0.268 CiteScore™:: 1.5 H-Index: 22

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MODULATION OF OPTICAL RADIATION BY MAGNETOMECHANICAL OSCILLATIONS IN THREE-LAYER COMPOSITE STRUCTURES

Том 74, Выпуск 3, 2015, pp. 199-206
DOI: 10.1615/TelecomRadEng.v74.i3.20
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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.

ЛИТЕРАТУРА
  1. Linchevskyi, I.V. and Petrishchev, O.N., Determination of material constants for magneto-optical crystals using the Faraday effect under magnetomechanical resonance conditions.

  2. Linchevskyi, I.V., Influence of magnetomechanical resonance on the light polarization in magneto-optical crystals.

  3. Arkhipsky, A.O. and Linchevsky, I.V., Self-excited oscillator based on magneto-optical crystal.

  4. Landau, L.D. and Lifshits, E.M., Theory of elasticity.

  5. 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.

  6. Bozort, R.M., Ferromagnetism.

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