Персона: Кульчин, Юрий Николаевич
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Non-Stationary Photovoltage in Materials Science of Wide Band-Gap Semiconductors of Modern Adaptive Optics and Optoelectronics
2019, Bryushinin, M. A., Sokolov, I. A., Romashko, R. V., Zavestovskaya, I. N., Kul'chin, Y. N., Завестовская, Ирина Николаевна, Кульчин, Юрий Николаевич
© 2019, Allerton Press, Inc.Non-stationary photovoltage excitation in silicon carbide and gallium oxide crystals is studied. The signal transient responses are measured, and the photoelectric parameters necessary for developing adaptive photodetectors, i.e., the specific photoconductivity, Maxwell relaxation time, and diffusion length of carrier transport, are determined. The sensitivity of the photodetector based on gallium oxide is determined.
Recording of Hydroacoustic Signals Using a Fiber-Optic Accelerometer
2020, Kamenev, O. T., Petrov, Y. S., Podlesnykh, A. A., Kolchinskii, V. A., Zavestovskaya, I. N., Kulchin, Y. N., Завестовская, Ирина Николаевна, Кульчин, Юрий Николаевич
© 2020, Allerton Press, Inc.Abstract: A prototype of a mobile fiber-optic accelerometer in which a multiturn optomechanical transducer placed in a fiber-optic Mach–Zehnder interferometer interferometer arm is used as a sensitive element is developed and studied. Passive phase demodulation using a fiber-optic splitter 3 × 3 maintains stable accelerometer operation in the case of a temperature drift of an operating point. The detectability of weak hydroacoustic signals using a fiber-optic interferometric accelerometer is shown.