【摘要】 掺铒光纤放大器设计应用于多波段放大,铒离子与其它稀土离子共掺杂所特有的宽吸收谱特性,使其在高功率放大器和高功率激光器的应用中得天独厚。为得到更宽放大带宽,最主要的是改变掺杂光纤的光谱性能。本文涉及的铒与镱、铥以及镧共掺杂光纤是采用MCVD工艺制备的,主要研究了离子浓度和掺杂比例对光纤光谱性能的影响。发现EDF的吸收与铒离子掺杂浓度以及铒离子与其它稀土离子的掺杂比例有关,同时通过加入其它稀土离子可以加宽EDF的吸收带。更多还原

【Abstract】 Erbium doped fiber amplifier is demonstrated at several wavelengths. The exceptionally broad and intense absorption spectrum of erbium with other rare-earth co-doped fiber is advantage in high power amplifiers and fiber lasers. In order to broad amplifying band, it is important to modify spectrum properties of erbium-doped optical fiber. In this dissertation, erbium with ytterbium, thulium and Lanthanum co-doped fibers are fabricated by MCVD. This paper focuses on the influence of concentration and ratio of rare-earth on spectrum properties of fiber. It is found that absorption of the EDFs is affected by erbium concentration and ratio of erbium and other rare-earth. Absorption band is broadened by adding dopant of other rare-earth.更多还原