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Proceedings Paper

Engineering rare-earth-doped heavy metal oxide glasses for 2-5 µm lasers
Author(s): Billy D. O. Richards; Animesh Jha; Vitaly Dorofeev; Tariq Manzur
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Paper Abstract

The electronic states in trivalent rare-earth ions offer an excellent opportunity for designing efficient fibre and bulk lasers for atmospheric remote sensing and LIDAR technology. The first part of this review article focuses on engineering passive fibres for 2-5 μm transmission. The fabrication of single-mode tungsten tellurite optical fibres from high purity bulk glass rods is described. Fibres with a numerical aperture of 0.1 and core diameter of 10±2 μm have been drawn using suction and rod-in-tube techniques of fibre preform fabrication. Losses of 2.3 dBm-1 at 974 nm have been measured. These fibres are of interest for use as passive transmission fibre or active fibres for lasing in the 2-5 μm spectral region. The use of heavy metal oxides in the fabrication of glass leads to extended infrared transmission. In the 2nd part of the review we compare the slope efficiencies of Tm3+ and Tm3+/Ho3+ doped glasses and fibres for 1950-2080 nm lasers using a range of pumping schemes in tellurite and germanium oxide hosts. We also explain the importance of choosing 1950-2080 nm tunable lasers as a pump source for stimulated emission at longer wavelengths.

Paper Details

Date Published: 13 May 2010
PDF: 6 pages
Proc. SPIE 7693, Unattended Ground, Sea, and Air Sensor Technologies and Applications XII, 769303 (13 May 2010); doi: 10.1117/12.852180
Show Author Affiliations
Billy D. O. Richards, Univ. of Leeds (United Kingdom)
Animesh Jha, Univ. of Leeds (United Kingdom)
Vitaly Dorofeev, Institute of Chemistry of High-Purity Substances (Russian Federation)
Tariq Manzur, Naval Undersea Warfare Ctr. (United States)

Published in SPIE Proceedings Vol. 7693:
Unattended Ground, Sea, and Air Sensor Technologies and Applications XII
Edward M. Carapezza, Editor(s)

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