Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China.
Photonics &Optical Communications, School of Electrical Engineering &Telecommunications, University of New South Wales, Sydney 2052, NSW, Australia.
Sci Rep. 2016 Sep 20;6:33865. doi: 10.1038/srep33865.
Erbium doped bismuth borosilicate (BBS) glasses, possessing the broadest 1.55 μm near infrared (NIR) emission band among oxide glasses, stand out as excellent fiber material for optical fiber amplifiers. In this work, we demonstrate that both broadened and enhanced NIR emission of Er(3+) can be obtained by sensibly combining the effects such as mixed glass former effect, phonon-assisted energy transfer (PAET) and de-excitation effect induced by codopant. Specially, by codoping CeO2 in a controlled manner, it leads to not only much improved optical quality of the glasses, enhanced NIR emission, but also significantly suppressed energy transfer up-conversion (ETU) luminescence which is detrimental to the NIR emission. Cerium incorporated in the glasses exists overwhelmingly as the trivalent oxidation state Ce(3+) and its effects on the luminescence properties of Er(3+) are discussed. Judd-Ofelt analysis is used to evaluate gain amplification of the glasses. The result indicates that Ce(3+)/Yb(3+)/Er(3+) triply doped BBS glasses are promising candidate for erbium doped fiber amplifiers. The strategy described here can be readily extended to other rare-earth ions (REs) to improve the performance of REs doped fiber lasers and amplifiers.
掺铒铋硼硅酸盐（BBS）玻璃在氧化物玻璃中具有最宽的 1.55μm 近红外（NIR）发射带，是光纤放大器的理想光纤材料。在这项工作中，我们证明通过合理结合混合玻璃形成体效应、声子辅助能量转移（PAET）和共掺杂剂引起的去激发效应，可以获得 Er（3+）的宽带和增强的 NIR 发射。特别是，通过控制共掺杂 CeO2，可以提高玻璃的光学质量，增强 NIR 发射，同时显著抑制对 NIR 发射有害的能量转移上转换（ETU）发光。掺入玻璃中的铈主要以三价氧化态 Ce（3+）存在，讨论了其对 Er（3+）发光性质的影响。使用 Judd-Ofelt 分析评估了玻璃的增益放大。结果表明，Ce（3+）/Yb（3+）/Er（3+）三掺杂 BBS 玻璃是掺铒光纤放大器的有前途的候选材料。这里描述的策略可以很容易地扩展到其他稀土离子（REs），以提高 REs 掺杂光纤激光器和放大器的性能。
