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Proceedings Paper

Laser fluorescence inhibition at the interface of a glass and an optically thick Cs vapor
Author(s): Jean-Marie Gagne; Karine Le Bris; Francois Babin; Marie-Claude Gagne
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Paper Abstract

A fluorescence radiation inhibition has been observed by absorption of a laser beam at a resonance of 852 nm at the interface of a Pyrex cell containing optically thick Cesium vapor. One observes a hole of GHz magnitude at the center of the retro-fluorescence signal associated with the lines of hyperfine structure 62P312-625112 (F =4,3). This phenomenon of inhibition, similar to a self-reversal of spectral lines, is found in the radiation generated by pooling effect. It occurs without a significant change in the absorption rate of laser energy. This is attributed to a coupling between atoms excited to 62P312 by laser pumping and a deposit of Cesium of atomic dimensions on the glass. At resonance, an important proportion of the atoms excited by the laser is in the vicinity of a thin conducting film. The non-radiating transformation process of the atomically excited energy to thermal energy is therefore favored. The interface lit by a monochromatic laser diode acts as a stop band filter and as a secondary luminous source. The width of the filter at half-height is proportional to the density of the atomic vapor. Sub-Doppler effects in inhibition spectral band have been observed. We present new experimental results and a phenomenon-related study of fluorescence inhibition induced by interfaced laser.

Paper Details

Date Published: 15 December 2000
PDF: 12 pages
Proc. SPIE 4087, Applications of Photonic Technology 4, (15 December 2000); doi: 10.1117/12.406359
Show Author Affiliations
Jean-Marie Gagne, Ecole Polytechnique (Canada)
Karine Le Bris, Ecole Polytechnique (Canada)
Francois Babin, EXFO (Canada)
Marie-Claude Gagne, National Research Council (Canada)

Published in SPIE Proceedings Vol. 4087:
Applications of Photonic Technology 4
Roger A. Lessard; George A. Lampropoulos, Editor(s)

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