输出高重复频率脉冲列的D型双包层掺Yb^3＋光纤放大器

利用5m长的D型双包层掺Yb^3＋光纤，采用声光调制锁模信号系统，实验上成功研制出输出320MHz的高重复频率脉冲列的光纤放大器，得到了20dB的增益输出，输出激光波长1064nm，输出平均功率1．02W，该光纤放大器可作为空间激光通信系统发射源。整个实验系统装置由作为信号源的特高重频脉冲列激光器、作为放大环节的光纤放大器和绿光倍频三个部分组成，另外对光纤放大器自激振荡谱线的各影响因素做了一些相关的实验研究，并对结果进行了分析讨论，提出了改进措施。

Fabrication and amplified spontaneous emission spectrum of Er3+-doped tellurite glass fiber with D-shape cladding

Tellurite glass is proposed as a host for broadband erbium-doped fiber amplifiers because of their excellent optical and chemical properties. A single-mode Er3+-doped tellurite glass fiber with D-shape cladding was fabricated in this work. The characterization of amplified spontaneous emission (ASE) from this newly fabricated Er3+-doped tellurite fibers are exhibited. When pumped at 980 nm, a very broad erbium ASE nearly 150 nm around 1.53 mum is observed. The changes in ASE with regard to fiber lengths and pumping power were measured and discussed. The output of 2 mW from Er3+-doped tellurite fiber ASE source was obtained under the pump power of 660 mW. The broad 1.53 mum emission of Er3+ in tellurite glass fiber can be used as host material for potential broadband optical amplifier and tunable fiber lasers. (C) 2004 Elsevier B.V. All rights reserved.