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  1. No Access

    Article

    Optical Properties and Terahertz Radiation Generation in a LI2B4O7 Crystal

    Spectral dependences of components of the refractive index and absorption coefficient in a Li2B4O7 (LB4) nonlinear crystal are determined in the THz range for the first time. Measurements have been carried out in...

    N. A. Nikolaev, A. A. Mamrashev, Yu. M. Andreev, D. M. Ezhov… in Russian Physics Journal (2021)

  2. No Access

    Article

    Generation of High Power THz Radiation in ZnGeP2 upon Femtosecond Ti:Sapphire Laser Pum**

    The possibility of generating high power terahertz radiation in a nonlinear crystal of zinc germanium phosphide (ZnGeP2) with pum** in a short-wavelength absorption shoulder of 0.67–2.5 μm is studied in detail....

    D. M. Lubenko, V. F. Losev, D. M. Ezhov… in Bulletin of the Russian Academy of Science… (2020)

  3. No Access

    Article

    IR-to-THz Down Conversion in Nonlinear GaSe:Al Crystals

    The optical properties and hardness of GaSe, GaSe:Al, GaSe:S:Al, and GaSe:Al:O crystals are studied to create effective terahertz radiation generators. Doped crystals differ from pure GaSe in high mechanical a...

    D. M. Lubenko, D. M. Ezhov, V. F. Losev… in Bulletin of the Russian Academy of Science… (2020)

  4. No Access

    Article

    Remote Imaging by Nanosecond Terahertz Spectrometer with Standoff Detector

    Creation and application of the remote imaging spectrometer based on high power nanosecond terahertz source with standoff detector is reported. 2D transmission images of metal objects hided in nonconductive (d...

    J.-G. Huang, Z.-M. Huang, Yu. M. Andreev, K. A. Kokh… in Russian Physics Journal (2018)

  5. No Access

    Article

    Model studies of THz-range generation via down conversion of the radiation of Ti:Sapphire lasers in LBO crystals

    Results from model studies of the possibility of creating a source of high-power picosecond pulses of terahertz radiation via optical rectification and phase-matched down conversion of femtosecond pulses of Ti...

    D. M. Lubenko, V. F. Losev, Yu. M. Andreev… in Bulletin of the Russian Academy of Science… (2017)

  6. No Access

    Article

    Down-Conversion of Short-Wavelength Radiation in LBO Crystal

    Comparative model analysis of the possibilities of down-conversion into the terahertz (THz) frequency range of radiation of all-solid-state femtosecond Ti:Sapphire laser systems and hybrid systems based on the...

    N. G. Kononova, A. E. Kokh, K. A. Kokh, G. V. Lanskii… in Russian Physics Journal (2016)

  7. No Access

    Article

    Optimal Do** of GaSe Crystals for Nonlinear Optics Applications

    Centimeter-sized crystals of GaSe have been grown by a modified vertical Bridgman method from a melt with content 0.01, 0.05, 0.1, 0.2, 0.5, 1, and 2 at.% Al and 0.025, 0.1, 0.5, 1, and 2 at.% Er using heat fi...

    Yu. M. Andreev, E. A. Vaitulevich, K. A. Kokh, G. V. Lanskii… in Russian Physics Journal (2014)

  8. No Access

    Article

    Dispersion properties of GaSe1-x S x in the terahertz range

    We grew nonlinear crystals of the solid solutions GaSe1–x S x (x ≤ 0.4) by the vertical Bridgman method. The increase in hardness from 8 kg/mm2 for x = 0...

    Lai-Ming Zhang, ** Guo, Dian-Jun Li, Ji-Jiang **e… in Journal of Applied Spectroscopy (2011)

  9. No Access

    Article

    Frequency conversion of CO laser radiation in the ZnGeP2 nonlinear crystal

    The experimental results of the study of CO laser frequency doubling in ZnGeP2 and GaSe nonlinear crystals of high optical quality are presented. A multifrequency low-pressure Q-switched CO laser and a selective ...

    Yu. M. Andreev, A. A. Ionin, I. O. Kinyaevskii… in Bulletin of the Lebedev Physics Institute (2010)

  10. No Access

    Article

    Optical properties of nonlinear solid solution GaSe1-x S x (0 < x ≤ 0.4) crystals

    Transmission spectra and phase matching conditions for second harmonic generation in GaSe1–x S x (0 < x ≤ 0.4) solid solution crystals are experimentally...

    S.-A. Ku, C.-W. Luo, H.-L. Lio, K.-H. Wu, J.-Y. Juang… in Russian Physics Journal (2008)

  11. No Access

    Article

    GaSe1−x S x solid solutions

    The most probable parameters of the pure, doped, and mixed GaSe1−xSx (x ≤ 0.4) crystals (solid solutions) are presented together with the results of investigations of their crystal structure and defects, optical ...

    T.-J. Wang, J.-C. Gao, Yu. M. Andreev, S. A. Bereznaya… in Russian Physics Journal (2007)