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Optical properties of highly Er-doped sodium-aluminium-phosphate glasses for broadband 1.5 μm emission |
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| Authors: | A Amarnath ReddyS Surendra Babu K PradeeshCJ Otton G Vijaya Prakash |
| Affiliation: | a Nanophotonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India b Laser Instrumentation Design Centre, Instrument Research and Development Establishment, Dehradun 248008, India c Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, 46022 Valencia, Spain |
| Abstract: | Erbium-doped Na3Al2P3O12 (NAP) glasses with compositions 92NAP-(8−x)Al2O3-(x)Er2O3 (where x = 2-8) were prepared and characterized for absorption, visible and NIR emission and decay time properties. Judd-Ofelt analysis has been carried out to predict radiative properties of luminescent levels of Er3+ ions. Comparatively larger photoluminescence lifetimes (7.86 ms) and larger quantum efficiencies (74%) for the laser transition, 4I13/2 → 4I15/2 (at 1.54 μm) are observed. The moisture insensitivity, large Er3+ ion doping capability and relatively high-gain and broad emission at 1.5 μm are the most notable features of these glasses to realize efficient short-length optical amplifiers. |
| Keywords: | Er-doped glass Optical spectroscopy Broadband Gain cross-section |
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