Engineering rare-earth-doped heavy metal oxide glasses for 2-5 µm lasers

Billy D. O. Richards; Animesh Jha; Vitaly Dorofeev; Tariq Manzur

doi:10.1117/12.852180

13 May 2010 Engineering rare-earth-doped heavy metal oxide glasses for 2-5 μm lasers

Billy D. O. Richards, Animesh Jha, Vitaly Dorofeev, Tariq Manzur

Proceedings Volume 7693, Unattended Ground, Sea, and Air Sensor Technologies and Applications XII; 769303 (2010) https://doi.org/10.1117/12.852180
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

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 2^nd 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.

Citation Download Citation

Billy D. O. Richards, Animesh Jha, Vitaly Dorofeev, and Tariq Manzur "Engineering rare-earth-doped heavy metal oxide glasses for 2-5 μm lasers", Proc. SPIE 7693, Unattended Ground, Sea, and Air Sensor Technologies and Applications XII, 769303 (13 May 2010); https://doi.org/10.1117/12.852180

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