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Proceedings Paper

Spectroscopic analysis of the Er3+ (4f11) absorption intensities in NaBi(WO4)2
Author(s): Dhiraj K. Sardar; Charles C. Russell; Raylon M. Yow; John B. Gruber; Bahram Zandi; Edvard P. Kokanyan
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Paper Abstract

A spectroscopic analysis is performed on Er3+ (4f11) ions doped in order to assess this material for its potential as a near infrared laser. The Judd-Ofelt model is applied to the room temperature absorption intensities of Er3+ (4f11) in NaBi(WO4)2 to obtain the three phenomenological intensity parameters: Ω2 = 5.50 x 10-20 cm2, Ω4 = 1.00 x 10-20 cm2, and Ω6 = 0.71 x 10-20 cm2. The intensity parameters are then used to determine the radiative decay rates (emission probabilities), radiative lifetimes, and branching ratios for the Er3+ transitions from the excited state multiplet manifolds to the lower-lying manifold states. Using the radiative decay rates for the Er3+ (4f11) transitions between the corresponding excited states and the lower-lying states, the radiative lifetimes of eight excited states of Er3+ are determined in this host. Using the room temperature fluorescence lifetime and the radiative lifetime of the 4I13/24I15/2 (1.52 µm) transition of Er3+ in NaBi(WO4)2, the quantum efficiency is determined to be 84% for this laser material.

Paper Details

Date Published: 8 July 2004
PDF: 12 pages
Proc. SPIE 5332, Solid State Lasers XIII: Technology and Devices, (8 July 2004); doi: 10.1117/12.523807
Show Author Affiliations
Dhiraj K. Sardar, Univ. of Texas at San Antonio (United States)
San Jose State Univ. (United States)
Army Research Lab. (United States)
Charles C. Russell, Univ. of Texas at San Antonio (United States)
Raylon M. Yow, Univ. of Texas at San Antonio (United States)
John B. Gruber, San Jose State Univ. (United States)
Bahram Zandi, Army Research Lab. (United States)
Edvard P. Kokanyan, Institute for Physical Research (Armenia)

Published in SPIE Proceedings Vol. 5332:
Solid State Lasers XIII: Technology and Devices
Richard Scheps; Hanna J. Hoffman, Editor(s)

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