Multiphonon Absorption and Photon Avalanche Criterion in Erbium Doped Materials

• Authors: F. Auzel
• Languages of publication: EN

Abstracts

EN

The photon avalanche effect has been recently observed at room temperature in erbium doped fluoride glasses and crystals, in a particularly clear way, displaying simultaneously all the typical features of this effect: (i) existence of a threshold for transmission at the excitation wavelength, (ii) up-conversion excitation threshold, (iii) long delay for threshold establishment. Analysing the first step of the avalanche effect as an anti-Stokes multiphonon absorption, it can be shown why this effect is so clearly observed at room temperature in our erbium studies. Our results are compared with other cases of avalanche, with cases which have been called "looping effects" and "quasi-avalanche" ones.

Keywords

EN

42.50.Hz; 42.62.Fi; 42.70.Hj; 78.50.Ec

Discipline

• 42.70.Hj: Laser materials
• 42.50.Hz: Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift(for multiphoton ionization and excitation of atoms and molecules, see 32.80.Rm, and 33.80.Rv, respectively)
• 42.62.Fi: Laser spectroscopy

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 1
• Pages: 7-19

Dates

published

1996-07

Contributors

author

F. Auzel

• France-telecom, CNET PAB/BAG-Laboratoire de Bagneux, Groupe Optique des Terres-rares, B.P.107, 92225, Bagneux, France

Identifiers

DOI

10.12693/APhysPolA.90.7