Accession Number : AD0634231

Title :   CONSIDERATION OF THE SPLITTING OF THE METASTABLE LEVEL OF A THREE-LEVEL QUANTUM GENERATOR,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Stepanov, B. I. ; Gribkovskii,V. P.

Report Date : 14 MAR 1966

Pagination or Media Count : 11

Abstract : Previous theoretical studies of a three-level laser have not taken into account the fact that in real materials the metastable level is split. A more rigorous treatment is presented here, considering the ruby laser as a four-level system and using the transition probabilities and particle distribution functions to derive the conditions for steady-state oscillation. Factors favoring transition from one or the other of the two metastable sub-levels to the ground state are examined in detail, and the requirements for establishing oscillation separately at either of the two levels are obtained. If the probabilities of particle redistribution between the components of the metastable level are small as compared to the probabilities of descent of excited particles into the metastable state, then simultaneous oscillation at both frequencies is possible. (Author)

Descriptors :   (*LASERS, *ATOMIC ENERGY LEVELS), RUBY, ELECTRON TRANSITIONS, PROBABILITY, DISTRIBUTION FUNCTIONS, OSCILLATION, USSR

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE