Towards mid-infrared fiber-lasers: rare earth ion doped, indium-containing, selenide bulk glasses and fiber

H. Sakr; Z. Tang; D. Furniss; L. Sojka; N. A. Moneim; E. Barney; S. Sujecki; T. M. Benson; A. B. Seddon

doi:10.1117/12.2039405

20 February 2014 Towards mid-infrared fiber-lasers: rare earth ion doped, indium-containing, selenide bulk glasses and fiber

H. Sakr, Z. Tang, D. Furniss, L. Sojka, N. A. Moneim, E. Barney, S. Sujecki, T. M. Benson, A. B. Seddon

Author Affiliations +

Proceedings Volume 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV; 89380V (2014) https://doi.org/10.1117/12.2039405
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

Chalcogenide glasses are promising materials for mid-infrared (IR) fiber lasers (i.e. 3 - 25 μm wavelength range). These glasses exhibit low phonon energies, together with large refractive indices, rare earth (RE-) ion solubility and sufficient mechanical and chemical robustness. Optical quality of the fiber is key. Gallium is known to promote RE-ion solubility in chalcogenide glasses, probably forming a [Pr^(III)] - Se - [Ga^(III)] associated type complex. Here, indium is investigated as an alternative additive to gallium in Pr³⁺-doped Ge-As-Se chalcogenide glasses. Indium has the same outer electronic structure as gallium. Moreover, indium has the advantage of being heavier than gallium, potentially promoting a lower phonon-energy, local environment of the RE-dopant. Zero to ~2000 ppmw (nominal parts per million by weight) Pr³⁺- doped Ge-As-In-Se bulk glasses are prepared using the melt-quench method. ~500 ppmw Pr³⁺- doped Ge-As-In-Se, optically-clad fiber is realized via fiber-drawing of extruded fiberoptic preforms. Fiber absorption and emission spectra are collected and compared with those of the bulk glasses.

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H. Sakr, Z. Tang, D. Furniss, L. Sojka, N. A. Moneim, E. Barney, S. Sujecki, T. M. Benson, and A. B. Seddon "Towards mid-infrared fiber-lasers: rare earth ion doped, indium-containing, selenide bulk glasses and fiber", Proc. SPIE 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, 89380V (20 February 2014); https://doi.org/10.1117/12.2039405

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