CASPIAN JOURNAL
MANAGEMENT AND HIGH TECHNOLOGIES
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Read | Urakseev Marat A., Pakhomov Alexander N. // Caspian journal : management and high technologies. — 2012. — №2. — pp. 100-108. |
Urakseev Marat A. - Sc.D. (Technics), Professor, Ufa State Aviation Technical University, 453000, Bashkortostan, Ufa, 12, K. Marx st., uma1941@mail.ru.
Pakhomov Alexander N. - postgraduate student, Ufa State Academy of Economy and Service, 450078, Bashkortostan, Ufa, 145, Chernyshevsky st., Allexx2010@mail.ru.
The mathematical model considering modulation of phase of the single-frequency coherent radiation at the output of the modulator is given. When it was built it was considered that the most used modes at the output of the modulator are the modes of 0; ± 1 orders. The dependences of intensity of the light of these modes (0; ± 1 orders) from intensity of the light source in form of a laser or a laser diode, and the length of the ultrasonic wave generated by piezo-emmiter powered by radio frequency generator are identified. The analysis of the acousto-optic displacement transducer which action is based on Raman-Nata’s acousto-optic diffraction is provided. The description of the diffraction spectrum of 0; ± 1 orders of acousto-optic frequency transducer of the radiation is given. Conversion of the single-frequency laser radiation by means of the acousto-optic transducer, based on the phenomenon of diffraction of light on ultrasonic waves is described mathematically. Diffraction of the coherent radiation on ultrasound provides receiving the coherent components of radiation with frequency displacement on an output of the acousto-optic modulator.The formula of a deviation of angles between the intensities of the light flux 0; ± 1 orders and the horizontal axis is given. It is concluded that the advantage of AO modulators is that the aperture of the input coherent radiation is practically unlimited. The values of control voltages and powers of the AO modulators are lower than those of the electro optical modulators.
Key words: mathematical model,acousto-optics,transducer,light diffraction,ultrasonic wave,coherent radiation,modulator,frequency shift,diffraction spectrum,diffraction grating,piezo-emmiter,refraction index,aperture