期刊
OPTICAL MATERIALS
卷 36, 期 6, 页码 1076-1082出版社
ELSEVIER
DOI: 10.1016/j.optmat.2014.01.038
关键词
Mid-infrared fiber lasers; Chalcogenide glasses
资金
- European Commission [317803]
- University of Nottingham, UK
- Wroclaw University of Technology, Poland
- Engineering and Physical Sciences Research Council [EP/K031082/1] Funding Source: researchfish
- EPSRC [EP/K031082/1] Funding Source: UKRI
- MRC [G0701869] Funding Source: UKRI
We present a study of mid-infrared photoluminescence in the wavelength range 3.5-5.5 mu m emitted from Pr3+: GeAsGaSe core/GeAsGaSe cladding chalcogenide fiber. The Pr3+ doped fiber optic preform is fabricated using extrusion and is successfully drawn to low optical loss, step-index fiber. Broadband mid-infrared photoluminescence is observed from the fiber, both under 1.55 mu m or 1.94 mu m wavelength excitation. Absorption, and emission, spectra of bulk glass and fiber are presented. Luminescent lifetimes are measured for the fiber and the Judd-Ofelt parameters are calculated. The radiative transition rates calculated from Judd-Ofelt theory are compared with experimental lifetimes. The observed strong broadband emission suggests that this type of fiber is a good candidate for further development to realize both fiber lasers and amplified spontaneous emission fiber sources in the mid-infrared region. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
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