脊形掺铒Al_2O_3光波导放大器级联特性的模拟计算  

Simulation for Net Gain Characteristics of Rib Er-doped Al_2O_3

作　　者：李成仁[1] 宋昌烈[2] 李淑凤[2] 宋琦[2] 李建勇[2] 

机构地区：[1]辽宁师范大学物理系,辽宁大连116029 [2]大连理工大学物理系,辽宁大连116024

出　　处：《光子学报》2005年第6期839-843,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.69889701);辽宁省科技厅(No.20022110);辽宁省教育厅(No.202123198)资助项目

摘　　要：利用有限元法分析了脊形掺铒Al2O3光波导放大器内信号光和抽运光的场模式分布、速率方程求解铒离子五能级系统的粒子数分布.数值模拟了光波导净增益与信号光功率的关系和多个放大器级联的净增益特性.结果表明级联系统存在着净增益亏损.低掺铒浓度的光波导作前级放大器的组合方式,级联系统总净增益最大.The modes configuration of the electromagnetic field of the signal light and the pump light within rib Er-doped Al2O3 waveguide amplifiers were analyzed using the finite element method. The population distribution of the five-levels system for Er3+ with 980 nm pump was solved using its rate equations. The relationship between the net gain of the waveguide and the signal power, and net gain characteristics of two or three rib Er-doped Al2O3 waveguide amplifiers in series were numerically simulated. The results show that there are two kinds of net gain losses. In the series system, the better total amplification ability can be obtained when the waveguide amplifiers with low-concentration is taken as a preamplifier than it is taken as a post-amplifier.

关 键 词：脊形Er:Al2O3光波导放大器 模拟计算 级联 信号功率 净增益亏损 

分 类 号：TN252[电子电信—物理电子学]