Design of Transmission Fibers and Doped Fiber Amplifiers for Mode-Division Multiplexing
Design of Transmission Fibers and Doped Fiber Amplifiers for Mode-Division Multiplexing
复制标题
DOI：
10.1109/lpt.2012.2218654
复制
发表时间：
2012-11-01
影响因子：
2.6
通讯作者：
Kahn, Joseph M.
中科院分区：
文献类型：
--
作者：
Askarov, Daulet;Kahn, Joseph M.
研究了12种信号模式（包括空间和偏振自由度）的传输光纤和掺铒光纤放大器（EDFA）。模场的数值计算和它们的有效面积，群延迟（GD），和色散系数的确定。数值求解多模速率方程，计算多模掺铒光纤放大器的模式相关增益和泵浦功率要求。结果进行了比较，为各种数值孔径（NA），折射率分布，和掺杂分布。渐变折射率降低包层光纤提供了传输光纤中低GD扩展（583 ps/km rms，0.15 NA）和EDFA中低MDG（25 dB模式平均增益下0.14 dB rms，0.15 NA）的有吸引力的组合。优化的铒掺杂分布由均匀的圆柱形区域加上额外的环形组成。
Transmission fibers and erbium-doped fiber amplifiers (EDFAs) for 12 signal modes (including spatial and polarization degrees of freedom) are studied. Modal fields are computed numerically and their effective areas, group delays (GDs), and chromatic dispersion coefficients are determined. Multimode rate equations are solved numerically to calculate mode-dependent gains (MDGs) and pump power requirements in multimode EDFAs. Results are compared for various numerical apertures (NAs), index profiles, and doping profiles. Graded-index depressed-cladding fibers offer an attractive combination of low GD spread in transmission fibers (583 ps/km rms with 0.15 NA) and low MDG in EDFAs (0.14 dB rms at 25-dB mode averaged gain with 0.15 NA). Optimized erbium doping profiles are comprised of a uniform cylindrical region plus an extra annulus.