Category Archives: Статья

The mechanism of stimulated Raman scattering of light in silicon doped with helium-like donors

R. Kh. Zhukavin, V. V. Tsyplenkov, V. N. Shastin Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod Abstract: Silicon doped with neutral helium-like magnesium donors was theoretically studied as an active medium in the terahertz frequency range. The inversion mechanism implemented in Si: Mg does not have the necessary efficiency under optical… Read More »

Multi-wave generation of stokes radiation components with a small inter-wave interval under stimulated Raman scattering in a SrMoO4 crystal

S. N. Smetanin, D. P. Tereshchenko, A. G. Papashvili, E. V. Shashkov, E. A. Peganov, K. A. Gubina, V. E. Shukshin, S. A. Solokhin, M. N. Ershkov, E. E. Dunaeva, I. S. Voronina, L. I. Ivleva Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow National University of Science and Technology «MISIS», Moscow… Read More »

High-power multimode semiconductor lasers (976 nm) based on asymmetric heterostructures with a broadened waveguide and reduced vertical divergence

S. O. Slipchenko, A. A. Podoskin, D. N. Nikolaev, V. V. Shamakhov, I. S. Shashkin, M. Kandratov, I. Gordeev, A. E. Grishin, A. E. Kazakova, P. S. Gavrina, K. Bakhvalov, P. S. Kop’ev, N. A. Pikhtin Ioffe Institute, St. Petersburg Abstract: The effect of the active region design on the vertical far field divergence of high-power… Read More »

Threshold characteristics of the 1.56 → 2.84 μm Raman transformation in methane under broadband pumping by powerful frequency-modulated pulses of erbium fiber source

A. A. Krylov, A. V. Gladyshev, Yu. P. Yatsenko, A. K. Senatorov, A. N. Kolyadin, A. F. Kosolapov, M. M. Khudyakov, M. E. Likhachev, I. A. Bufetov Fiber Optics Research Center of the Russian Academy of Sciences, Moscow Abstract: The threshold characteristics of Raman lasing at 2.84 μm wavelength in a hollow revolver fiber filled… Read More »

Physical method and optical elements for improving radiation quality of wide-aperture lasers

V. G. Niz’ev Institute on Laser and Information Technologies, Branch of the Federal Research Centre ‘Crystallography and Photonics’ Abstract: On the basis of fundamental research, a method for improving the quality of laser radiation at Fresnel numbers greater than one is proposed. The method consists in providing the generation of a ”pure” high-order Laguerre-Gaussian ring… Read More »

Observation of a coherent lasing channel under spectral summation of laser diode radiation

S. I. Derzhavin, Ya. V. Kravchenko, D. N. Mamonov, S. V. Podmazov, V. N. Timoshkin Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow National Engineering Physics Institute “MEPhI”, Moscow Abstract: In the experimental studies of incoherent summation of laser diode radiation with the spectral summation scheme an additional channel of coherent generation… Read More »