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Proceedings Paper

Pulse generation, spectroscopy, and transitions dynamics of Er3+ ions in YAG host
Author(s): Piotr Konieczny; Jacek Świderski; Andrzej Zając
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Paper Abstract

In Er:YAG, Er:YSGG and Er:YLF lasers the most important are the three lowest energy levels of Er3+ ion. Transitions between these levels decide about wavelength of generated laser radiation. In Er:YAG laser these levels are: 4I15/2 (energy: 280 cm-1), 4I13/2 (6710 cm-1), 4I11/2 (10330 cm-1) [1]. Er:YAG has many absorption lines mainly in visual and near infrared wavelength spectrum. This laser may generate optical radiation at two wavelengths: 1,6 μm and 2,94μm. For the first one Er:YAG works as a three level quantum system and the for the second one it works as a four level quantum system. In this case the top laser level is 4I11/2 and the down laser level is 4I13/2. Both the wavelength generated and the work mode may be selected by dopant concentration. In lasers such as Er:YAG an analysis of transitions between levels during optical radiation absorption and generation the Boltzman distribution of energy levels occupation and thermalization effects must be taken into consideration [2]. Authors have developed computer software, which allows analysing transitions dynamics, laser output power/energy and rod's temperature increase (during pulse generation) which depends on: pump properties, initial temperature, and dopant concentration. Analysis may be carried on for monopulse generation as well as for pulse generation. This software allows simplifying Er:YAG laser application designing.

Paper Details

Date Published: 28 December 2007
PDF: 10 pages
Proc. SPIE 6937, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007, 693717 (28 December 2007); doi: 10.1117/12.784674
Show Author Affiliations
Piotr Konieczny, Military Univ. of Technology (Poland)
Jacek Świderski, Military Univ. of Technology (Poland)
Andrzej Zając, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 6937:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007
Ryszard S. Romaniuk, Editor(s)

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