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  1. No Access

    Article

    Broadband Antireflection Coatings Composed of Subwavelength-Sized SiGe Particles

    Antireflection properties of subwavelength-sized dielectric SiGe particles grown on Si(100) substrates using the dewetting phenomenon are studied. The average particle size has been set by the amount of deposi...

    D. E. Utkin, A. V. Tsarev, E. N. Utkin… in Optoelectronics, Instrumentation and Data … (2021)

  2. No Access

    Article

    Doppler shift of the modulation frequency of laser radiation scattered by a moving object

    It is shown theoretically and experimentally that the intensity of amplitude-modulated coherent optical radiation scattered or reflected by a moving object carries information about the velocity in the form of...

    V. S. Sobolev, E. N. Utkin, G. A. Kashcheeva, F. A. Zhuravel’… in Optics and Spectroscopy (2015)

  3. No Access

    Article

    On the influence of the scattering particle concentration on the probe beam coherence, signal quality, and measuring accuracy of interferometric systems

    Experimental data on the influence of the scattering particle concentration in a turbid medium on the probe beam coherence, statistic characteristics of responses, and measuring accuracy of interferometric sys...

    V. S. Sobolev, E. N. Utkin, G. A. Kashcheeva in Technical Physics (2012)

  4. No Access

    Article

    Using the optical feedback regime for evaluating the slope of the modulation characteristic of a semiconductor laser

    A new simple method based on the optical feedback phenomena is proposed for evaluating the slope of the modulation characteristic (generation frequency versus injection current) of a semiconductor laser. The s...

    V. S. Sobolev, E. N. Utkin in Technical Physics Letters (2009)

  5. No Access

    Article

    Generation of Taylor vortices in Couette flow

    Yu. G. Vasilenko, E. A. Kuznetsov… in Journal of Applied Mechanics and Technical… (1980)

  6. No Access

    Article

    Experimental investigation of flow in a trench

    An experimental investigation was made of the flow of a viscous incompressible liquid in a trench of square transverse cross section, using a laser Doppler velocimeter. The investigation was made with two valu...

    V. Ya. Bogatyrev, Yu. N. Dubnishchev… in Journal of Applied Mechanics and Technical… (1976)

  7. No Access

    Article

    Study of gas-saturated turbulent streams using a laser doppler velocity meter

    New experimental results on the study of a turbulent gas-saturated stream in a tube using a laser Doppler velocity meter and a thermoanemometer are discussed. The distributions of the volumetric gas content ov...

    Yu. N. Dubnishchev, A. R. Evseev… in Journal of Applied Mechanics and Technical… (1975)

  8. No Access

    Article

    The development of an optical Doppler technique for measuring flow velocities

    For a generalized scheme of LDV, the expressions describing the light intensity distribution in a photo-receiver plane with regard to the size of the scattering particles have been calculated using Fourier opt...

    Yu G. Vasilenko, Yu N. Dubnitshev, V. P. Koronkevitch, V. S. Sobolev… in Opto-electronics (1973)

  9. No Access

    Article

    Problems of theory and practical use of a laser doppler velocimeter in the investigation of turbulent flows

    At present great attention is being devoted to the development of laser Doppler velocimeters (LDV) for experimental investigation of turbulent flows. The main types of optical schemes of LDV are discussed in t...

    G. A. Barill, Yu. N. Dubnishchev… in Journal of Applied Mechanics and Technical… (1973)

  10. No Access

    Article

    Comparison of readings from a laser doppler velocimeter and a hot-wire anemometer in the wake behind a cylinder

    A. N. Domaratskii, Yu. N. Dubnishchev… in Journal of Applied Mechanics and Technical… (1972)