Tunable and polarization-controlled high-contrast bright and dark coherent resonances in potassium.

We demonstrate high-contrast electromagnetically induced absorption (EIA) bright resonances on the D line of K39 with characteristics comparable to those of the electromagnetically induced transparency (EIT) dark resonances observed in the same conditions. EIA is produced by the interaction of a weak probe beam with the atomic ground state driven in a degenerate coherent superposition by either a co- or counter-propagating pump beam. We have obtained an order of magnitude increase of the EIA's contrast with respect to previous similar experiments, performed with other alkalis, without compromising its linewidth.

Luminescence in germania-silica fibers in a 1-2 μm region.

We analyze the origins of the luminescence in germania-silica fibers with high germanium concentration (about 30 mol.% GeO) in the region of 1-2 μm with a laser pump at the wavelength 532 nm. We show that such fibers demonstrate the high level of luminescence which unlikely allows the observation of photon triplets, generated in a third-order spontaneous parametric downconversion process in such fibers.

[Status and development prospects of radiological health in the Navy].

More than 7.5 thousands of people work as military and civilian personnel and have an access to a lot of sources of ionizing radiation on ships and vessels, at coastal units and institutions of the Navy. This fact determines the importance of radiation safety and medical preventive measures on naval fleets.

[Department of training of physicians (for Missile Forces and Army) of Military-medical academy n. a. S.M.Kirov celebrates the 70th anniversary].

The article is dedicated to the history of the one of educational units of the Kirov Medical Academy. Department of training of physicians (for Missile Forces and Army) traces its origins to 1942 published in the resolution of the State Committee of Defense of the USSR, but in fact is the successor to hospital schools in the land and the Admiralty hospitals.

[From the history of military-medical education in XVIII century].

The article deals with the development of national medical education. The above materials are based mainly on archival material, published documents and publications of military history topics. The authors have shown that even with the publication of the decree on the construction (01.