文档介绍：华中科技大学
硕士学位论文
窄线宽掺镱光纤激光器的研究
姓名:张志楠
申请学位级别:硕士
专业:光学工程
指导教师:陆培祥
2011-01-03
华中科技大学硕士学位论文
摘要
窄线宽光纤激光器做为光纤激光器的一个重要方向,以其窄线宽、低噪声等优
点广泛应用于光纤传感、光纤遥感、高精度光谱及光纤通信等领域,具有较高的研
究价值。
本文从镱离子能级结构的研究出发,结合光纤光栅反射谱的理论仿真,详细分
析了 DBR(分布布拉格反射式)结构的窄线宽掺镱光纤激光器的单纵模工作条件。
在理论研究基础上,我们确定了实验方案和相关关键器件,包括泵浦源、非球
面透镜组、光纤光栅等,搭建了 DBR 结构掺镱光纤激光器实验平台。并采用飞秒脉
冲激光相位掩模板法在双包层(10/125μm)光纤中制备了中心波长 1065nm、反射率
为 20dB,插入损耗为小于 ,3dB 带宽为的布拉格光栅。通过改进实验
平台和优化实验参数,获得了最大输出功率 ,波长为 ,线宽为
的窄线宽光纤激光稳定输出。
最后我们搭建了全光纤结构的窄线宽光纤激光器,获得了初步实验结果,并提
出了今后实验的改进方案。

关键词: 光纤激光器窄线宽光纤光栅 DBR
I
华中科技大学硕士学位论文
Abstract
Narrow linewidth fiber laser, as a hotspot in research of fiber laser, has received more
attention of the researcher. The technology of narrow linewidth fiber laser is more and
more mature. The fiber laser is widely used in high precision sensing technologies. The
DBR structure fiber laser is a better technical proposal, because it have the advantages of
good stability, small size, simple structure and so on.
The paper mainly introduce each steps in the experiment of high power narrow
linewidth Yb-doped fiber laser, including reseaching beforehand, theory preparation,
analogue simulation, purchasing instruments and platform construction. Finally, we have
presented a high power laser with more than output, narrow linewidth of 21pm
Yb-doped double-cladding fiber laser that utilizes two FBGs inscribed directly into the
double-cladding fiber core using femtosecond laser pulses. The laser works at 1064nm,
which exhibits extremely good stability by temperature control of the FBGs.
First, we have researched the transmission theory and fabrication technique, and
understood the theory of the FBGs’ optical properties. We use the femtosecond laser
pulses and the phase mask technique to inscribe FBG essfully.
Moreover, we have simulated the design constraints required to achieve single
longitudinal mode operation from a standing-wave, ho