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10 December 1999 Optical amplifiers and lasers in infrared fibers
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We are currently investigating two infrared glasses for active applications. Gallium lanthanum sulphide (GLS) glass is investigated as a potential host material for rare-earth doped mid-infrared fiber lasers. We have fabricated gallium lanthanum sulphide glass by melt quenching and drawn it into fibers using the rod-in-tube technique. Fluoroaluminate glasses (ALF) are being prepared in planar form by spin coating and clad waveguides have been achieved. The quality of waveguides from both these materials is gradually being improved as methods to eliminate transition metals and other impurities, understand crystallization and reduce the imperfections at the core/clad interface are developed. Although initially motivated by the demand for a practical 1310 nm amplifier, interest has now extended further into the infrared. We describe recent progress in these glasses, their properties and applications.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dominic Brady, N. Fagan, D. W. J. Harwood, M. J. Hesford, Daniel W. Hewak, T. B. Hudson, R. C. Moore, David N. Payne, Thorsten Schweizer, Elizabeth R. M. Taylor, J. A. Tucknott, C. J. Voyce, E. Weatherby, and Yvonne D. West "Optical amplifiers and lasers in infrared fibers", Proc. SPIE 3849, Infrared Optical Fibers and Their Applications, (10 December 1999);

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