Accession Number : AD0684670

Title :   CERTAIN CHARACTERISTICS OF A FIBER OPTICS LASER,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Gvatua,Sh. Sh. ; Kukharskii,R. N. ; Mumladze,V. V. ; Khanevichev,V. A. ; Chavchanidze,V. V.

Report Date : 03 OCT 1968

Pagination or Media Count : 6

Abstract : Stimulated emission in fiber bundles containing an arbitrary number of fibers, and the dependence of radiation halfwidth on the pumping energy for both single and bundled fibers, are investigated. It was found that as the pumping energy increases, so do the number of 'spikes,' the emission intensity, and the halfwidth of the emission lines. When individual fibers were assembled into bundles the spikes disappeared. Stimulated emission traces for one fiber and for 8- and 20-fiber bundles displayed a continuous 'flat' line with peaks leveled off; the pumping theshold remained constant and radiation intensity increased in proportion to the number of fibers. For a large bundle of fibers, the rings were washed out and the modes were not resolved, but the halfwidth of the radiation lines remained within the same range. Individual modes could not be resolved even with zero-order interference. It is concluded that the emission from single fibers and from fiber bundles is the same and of a stimulated nature.

Descriptors :   (*LASERS, *FIBER OPTICS), OPTICAL PUMPING, GLASS, NEODYMIUM, LINE SPECTRA, USSR

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE