Laser media and control of laser radiation parameters

Mechanisms of population inversion based on the difference between transport cross sections of particles in different quantum states

A. I. Parkhomenko


Abstract: An analysis is made of possible mechanisms of a partial or total velocity population inversion based on the difference between the transport cross sections of particles in different quantum states m and n. A partial velocity population inversion is due to a difference between the rates of change of the temperature of the active particles in states m and n as a result of collisions with buffer particles having a temperature different from that of the active particles. Total population inversion is due to the different attenuation of the intensities of directional beams of active particles in states m and n as these propagate through the buffer gas.

UDC: 533.15:539.19

PACS: 32.80.Bx, 33.80.Be

Received: 12.05.1988

 English version: Soviet Journal of Quantum Electronics, 1989, 19:8, 1086–1088

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