两段级联宽带碲基掺铒光纤放大器特性研究

量子电子学报 , 2006, 23(1): 109-114. doi: 10.3969/j.issn.1007-5461.2006.01.019

两段级联宽带碲基掺铒光纤放大器特性研究

李浩泉 ^1, , 聂秋华 ^2, , 徐铁峰 ^3, , 周亚训 ^4, , 姜程 ^5,

1.宁波大学信息科学工程学院,浙江,宁波,315211

2.宁波大学信息科学工程学院,浙江,宁波,315211

3.宁波大学信息科学工程学院,浙江,宁波,315211

4.宁波大学信息科学工程学院,浙江,宁波,315211

5.宁波大学信息科学工程学院,浙江,宁波,315211

基金项目: 中国科学院资助项目(6027034) 浙江省宁波市科技局资助项目(02J20101-01) 浙江省自然科学基金(601011;M603019)

关键词：光通信 , 碲基掺铒光纤放大器 , 增益特性 , 噪声系数 , 光隔离器

Performances research of two-stage broadband erbium-doped tellurite fiber amplifier

利用四能级结构速率方程组和光功率传输方程组,研究了在碲基掺铒光纤(EDTF)中内插一个光隔离器、形成两段级联的碲基掺铒光纤放大器(EDTFA)后对EDTFA性能的改善.结果表明,在给定泵浦方式、泵浦功率、纤芯掺杂浓度和输入信号功率条件下,两段级联EDTFA可以有效的抑制光纤中反向传输放大自发辐射(ASE)噪声,降低反转粒子数的消耗,从而提高信号增益、输出功率,并且降低了噪声系数.对不同光纤长度和光隔离器内插在光纤中不同位置的研究表明,当光纤为最佳长度和光隔离器在最佳位置处时,可使短波长信号增益增加10 dB,噪声系数减小1 dB,并进一步增加了放大带宽以及功率转换效率.

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