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Доклады Академии наук

Polarization of spontaneous and stimulated emission from vapors of complex molecules

Alexander P. Blokhin, Nikolai A. Borisevich, I. I. Kalosha, Vitaly Antonovich Tolkachev

Published Jan 1, 1978• 0 citations
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Experimental data on the amplification of polarized light in optical quantum amplifiers utilizing laserpumped dyes show that, in general, the polarization of the amplified light differs from that of the light being amplified. A theory is put forward whereby this effect is related to the anisotropy of the stimulated emission characteristic of complex organic molecules and is interpreted as a difference between the polarizations of the stimulated emission and stimulating radiation. The complex polarizability tensor is used as the main optical characteristic of complex molecules. The possibility of using the difference between the polarizations of the stimulated emission and stimulating radiation to produce light-amplifying polarizers and optical switches is indicated.
We have observed, for the first time to our knowledge, stimulated emission in atomic-copper vapor that is excited by a resonant tunable laser beam. One of the important and interesting results obtained in this experiment is that excitation of the (2)P(1/2) level of the copper atoms generates strong amplified spontaneous emission (ASE) for both(2)P(1/2)-(2)D(3/2) and (2)P(3/2)-(2)D(5/2) transitions. This is the first reported direct experimental evidence observed for collisional mixing between the (2)P(1/2) and (2)P(3/2) levels in a copper-vapor laser. Excitation of the (2)P(3/2) level induces substantially weaker ASE for the (2)P(1/2)-(2)D(3/2) transition. In addition, we observed collision-induced ASE for both transitions over a wide range of detuning of the pump frequency. The preliminary results of the experiment are presented, and the implications of the results for high-pressure copper-vapor lasers are discussed.