文档介绍：河北大学
硕士学位论文
LD泵浦的全光纤铒镱共掺双包层光纤激光器研究
姓名:关泽琳
申请学位级别:硕士
专业:光学
指导教师:苏红新
20100601
摘要
摘要

铒镱共掺光纤激光器作为一种适用于全光纤通信网络和 WDM 通信系统的新型光
源备受关注,自 20 世纪 80 年代后期以来得到迅猛地发展。本文从理论和实验两方面对
DBR 全光纤铒镱共掺双包层光纤激光器进行了系统研究。
。讨论了稀土掺杂
双包层光纤光纤的种类和特性、光纤激光器的光腔结构和泵浦源配置方式。分析了铒镱
系统的能级结构和辐射原理。根据粒子数速率方程组和功率传输方程组,结合边界条件
建立了铒镱共掺光纤激光器的稳态理论模型。
matlab 软件和龙格—库塔算法对铒镱共掺光纤激光器的稳态工作特性进行
了理论模拟,讨论了泵浦功率、光纤长度、后端镜反射率、铒镱掺杂比例与输出功率特
性之间的关系,为光纤激光器的优化设计提供了理论依据。
。搭建了三种采用不同参数的
DBR 型全光纤结构激光器,并对其光谱特性、功率特性和时域特性进行了对比实验。
在最优化参数条件下测得输出功率达到最高值 2W,斜率效率为 %,激光中心波长
,3dB 线宽约。同时,实验结果验证了理论的正确性。

关键词铒镱共掺光纤激光器全光纤输出功率光谱特性

Ⅰ
Abstract
Abstract

Er3+/Yb3+ co-doped fiber lasers, as a new-pattern laser source applicable to all-fiber
work and WDM System, have been paid great attention and developed
rapidly since later 1980s. In this dissertation, theoretical and experimental investigations of
Er3+/Yb3+ co-doped fiber laser are presented systematically.
1. Basic principles and design philosophy of Er3+/Yb3+ co-doped fiber lasers are globally
summarized. Properties and variety of double-clad fiber, cavity structure of fiber laser and
pumping mode are discussed. Level structure and radiation theory of Er3+/Yb3+ system is
analyzed. The theoretical model of Er3+/Yb3+ co-doped fiber laser is established based on rate
equations for the atomic populations and power propagation equations.
2. Theoretical simulation on working characteristics of Er3+/Yb3+ co-doped fiber laser in
steady state is made using Rounge-Kutta method with Matlab. The relationship between the
pump power, the fiber length, the reflectivity of the output mirror, the doping ratio of Yb3+
and Er3+ and output characteristics is discussed, which provides the theoretical basis for
optimizing the fiber laser.
3. Experimental studies on Er3+/Yb3+ co-doped fiber laser are presented. Three kinds of
all-fiber DBR