[en] The Russian laser science community has suffered a heavy loss. Artur Afanas'evich Mak, a renowned researcher, eminent organiser of Soviet and Russian science, Distinguished Science Worker of the Russian Federation, doctor of physics and mathematics, professor and a member of the Editorial Council of the Kvantovaya Elektronika (Quantum Electronics) journal, died in his 86th year. (obituary)

[en] Invaluable is the contribution of academician Borisevich to the development of optics, spectroscopy and their applications. He is the author of scientific discoveries and more than 600 scientific papers. For outstanding scientific achievements Nikolai Aleksandrovich was awarded the Lenin Prize, State Prize of the USSR and the Republic of Belarus. His scientific school gave a start in life to more than 30 candidates of science, 12 doctors, including 4 members of the National Academy of Sciences of Belarus. (obituary)

No abstract available

No abstract available

[en] Aleksandr Mikhailovich Prokhorov was a Russian physicist, academician, one of the originators of quantum electronics, laser physics and laser technologies, winner of the 1964 Nobel Prize in Physics 'for fundamental work in the field of quantum electronics, which has led to the construction of oscillators and amplifiers based on the maser – laser principle' (shared with N.G. Basov and Ch.H. Townes), Lenin Prize and State Prize winner and twice Hero of Socialist Labour. (personalia)

[en] We have analysed the possibility of appearance of anti-Stokes lines in the spectrum of Raman scattering of a photon by a 'quasi-bound' charged particle in the regime of planar (axial) channelling. It is shown that radiation may emerge at the frequency, which is a combination of the incident photon frequency ω₀ and transition frequency ω_i in the transverse quantised motion of a channelled particle: ω = ω₀ ± 2γ²ω_i, where γ is the relativistic (Lorentz) factor of a channelled particle. (nonlinear optical phenomena)

No abstract available

[en] We report emission parameters of high-power cw 980-nm laser diodes (LDs) with a stripe contact width of 100 μm. On copper heat sinks of the C-mount type, a reliable output power of 10 W is obtained at a pump current of 10 A. Using a heat flow model derived from analysis of calculated and measured overall efficiencies at pump currents up to 20 A, we examine the possibility of raising the reliable power limit of a modified high-power LD mounted on heat sinks of the F-mount type using submounts with optimised geometric parameters and high thermal conductivity. The possibility of increasing the maximum reliable cw output power to 20 W with the use of similar laser crystals is discussed. (lasers)

[en] Using three-dimensional thermal modelling of a highpower 980-nm laser diode with a stripe contact width of 100 μm as an example, we analyse the thermal parameters of high-power laser diodes mounted using submounts. We consider a range of thermal conductivities of submounts that includes parameters of widely used thermal compensators based on AlN, BeO and SiC, as well as on CuW and CuMo composites and polycrystalline and single-crystal synthetic diamond with high thermal conductivity. Taking into account experimental overall efficiency vs. pump current data, we calculate the temperature of the active layer as a function of the width, thickness and thermal conductivity of the submount at thermal loads corresponding to cw output powers of 10, 15 and 20 W. (lasers)

[en] The spectral characteristics of cw laser diodes with a maximum reliable power of 15 W mounted on F-mount heat sinks are studied. It is found that the spectrum envelopes have features at emission powers exceeding 5 – 7 W. A method for determining the maximum of a spectrum envelope under the conditions of its broadening and appearance of features is discussed. The thermal resistance of diodes is determined experimentally at pump currents from threshold to maximum (14 A) and is found to be 2.25 K W^-1 at a current of 10 A and 1.5 K W^-1 at a current of 4 A. The results obtained are compared with the literature data. The adequacy of using the thermal resistance parameter for comparing and estimating thermal characteristics of laser diodes is considered. (lasers)