| 掺杂分布对多模光纤放大器输出特性的影响 |
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| 引用本文： | 陈爽,冯莹,王玲.掺杂分布对多模光纤放大器输出特性的影响[J].光电工程,2009,36(4). |
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| 作者姓名： | 陈爽 冯莹 王玲 |
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| 作者单位： | 国防科技大学,光电科学与工程学院,长沙,410073 |
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| 摘 要： | 针对高功率多模光纤放大器中稀土离子掺杂分布和形状对系统输出特性的影响,本文进行了数学模拟和理论分析.根据多模掺杂光纤速率方程考虑了种子光端面激励特性,并对纤芯模式耦合系数矩阵进行了修正,建立了多模光纤放大器理论模型.通过对功率传输方程组的求解,数值模拟了不同激励条件下6种均匀和抛物线形掺杂的双包层掺Yb3+光纤接入放大器的输出特性.计算结果证明:不同激励条件下,掺杂离子分布对输出特性的影响存在差异;通过设计光纤内掺杂离子分布规律和形状能有效抑制放大器中的高阶模式,提高输出光的光束质量.
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| 关 键 词： | 高功率多模光纤放大器 理论模型 掺杂离子分布 高阶模 |
Effect of Rare Earth Dopant Profiles on the Output Characteristics of the Multimode Fiber Amplifier |
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| CHEN Shuang,FENG Ying,WANG Ling.Effect of Rare Earth Dopant Profiles on the Output Characteristics of the Multimode Fiber Amplifier[J].Opto-Electronic Engineering,2009,36(4). |
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| Authors: | CHEN Shuang FENG Ying WANG Ling |
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| Affiliation: | CHEN Shuang,FENG Ying,WANG Ling(College of Optoelectric Science and Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | A theoretical model of high power multimode fiber amplifier is built based on rate equations of the multimode rare earth doped fiber considering the launching condition of the seed light and improvement of the mode coupling in the core.The theoretical study on the effect of rare earth dopant profiles in the core on the output characteristics is carried out.The output characteristics of the high power multimode fiber amplifier with flat and parabolic dopant profiles fibers in different launching conditions a... |
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| Keywords: | high power multimode fiber amplifier theoretical model rare earth dopant profile high-order mode |
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