Rare earth-aluminum oxide glasses for optical applications

Abstract Glasses based on rare earth oxides and aluminum oxide with 0–20 mol% SiO 2 provide a combination of optical properties, mechanical and chemical stability, and process characteristics not available in other oxide materials. Properties of the glasses include: refractive index 1.7–1.8, low dispersion (Abbe number ∼40), high solubility of optically active dopants, homogeneous chemical composition, long fluorescence lifetimes at dopant concentrations up to 5 mol%, broad fluorescence bandwidth, and infrared transmission to ≈5000 nm. The glasses are hard, strong and resist chemical attack and they can be cast in sections 5–10 mm thick. This paper briefly describes glass processing and presents bulk glass properties including results of experiments to study infrared fluorescence at wavelengths ∼1550, ∼2900 and ∼1030 nm from Er- and Yb-doped glasses that were optically pumped at 980 nm.

[1]  D. Day,et al.  Crystallization Kinetics of a Lithia–Silica Glass: Effect of Sample Characteristics and Thermal Analysis Measurement Techniques , 1991 .

[2]  E. Desurvire.  Erbium-doped fiber amplifiers , 1994 .

[3]  Nasser N Peyghambarian,et al.  Cooperative upconversion and energy transfer of new high Er 3+ - and Yb 3+ –Er 3+ -doped phosphate glasses , 2000 .

[4]  S. Krishnan,et al.  Levitation apparatus for structural studies of high temperature liquids using synchrotron radiation , 1997 .

[5]  Gregory A. Jerman,et al.  Glass Formation and Polyamorphism in Rare‐Earth Oxide–Aluminum Oxide Compositions , 2004 .

[6]  R. Saroyan,et al.  Optical properties of Nd3+ in metaphosphate glasses , 1981 .

[7]  W. Wolfe,et al.  The Infrared Handbook , 1985 .

[8]  T. R. Gosnell,et al.  Uniform upconversion in high-concentration Er(3+)-doped soda lime silicate and aluminosilicate glasses. , 1997, Optics letters.

[9]  Dennis R. Merkley,et al.  Enhanced formation of calcia-gallia glass by containerless processing , 1993 .

[10]  P. Nordine,et al.  Glass fibres of pure and erbium- or neodymium-doped yttria–alumina compositions , 1998, Nature.

[11]  Klaus Petermann,et al.  New Oxide Crystals for Solid State Lasers , 1999 .

[12]  R. Waynant,et al.  Synthesis and Optical Properties of Rare‐Earth–Aluminum Oxide Glasses , 2004 .

[13]  A Mori,et al.  Gain characteristics of tellurite-based erbium-doped fiber amplifiers for 1.5-microm broadband amplification. , 1998, Optics letters.

[14]  Hans P. Jenssen,et al.  Advanced solid-state lasers , 1991 .