掺镱双包层光纤激光器的研究进展

摘要: 光纤激光器的研究一致受到广泛关注，而双包层光纤的出现却是该领域出现的重大突破，它的出现使得高功率激光器制作成为可能。自从1988年E. Snitzer提出包层泵浦光纤激光器以来，该技术被广泛的应用到高功率光纤激光器领域。本文主要内容：首先阐述了光纤激光器的工作原理及结构，掺镱双包层光纤激光器泵浦源的选择，掺镱双包层光纤的特性及其影响因素。再说明光纤中镱离子的受激辐射、镱离子的能级结构以及光谱特性，显示了镱离子掺杂光纤的优异特性。最后阐述掺镱双包层光纤激光器国内外的发展进程，及掺镱双包层光纤激光器发展面临的问题。55209

毕业论文关键词: 双包层光纤激光器，掺镱双包层光纤，包层泵浦技术

Abstract：Research in fiber laser has attracted wide attention, and the emergence of double-clad fiber is an important breakthrough in the field, which makes the advent of high power laser become possible. Since E. Snitzer put forward cladding pumped fiber laser in 1988, the technology has been widely applied to the field of high power fiber laser. This thesis mainly contains the following aspects. This paper first expounds the working principle and structure of fiber laser, and the choice of pump source for the ytterbium doped double clad fiber laser, and the characteristics of ytterbium doped double clad fiber and its influencing factors. Then we explain the stimulated radiation, energy level structure, and spectral characteristics of ytterbium ion in optical fiber, showing the excellent properties of ytterbium ion doped fiber. Finally, we expound the history of ytterbium doped double clad fiber laser both at home and abroad, and point out the problems this laser is facing with.

Keywords: double-clad fiber laser, double-clad Yb-doped fiber, cladding pumping technique

1 前言 4

1.1 光纤激光器的工作原理 4

1.2 光纤激光器结构及泵浦耦合方式 4

1.3 掺镱双包层光纤的结构 7

1.4 影响双包层光纤特性的因素 8

1.5 掺镱双包层光纤激光器的应用 9

2 掺镱双包层光纤激光器的特性及其研究进展 10

2.1 镱离子的能级结构和光谱特性 10

2.2 谐振腔技术 11

2.3 掺镱双包层光纤激光器的研究进展 13

2.3.1 国外研究进展 13

2.3.2 国内研究进展 14

2.4 本章小结 15

结论 16

参考文献 17

致谢 18

1 前言

1.1 光纤激光器的工作原理

光纤激光器[1]是以光纤作为波导介质的一种激光器，与传统的固体激光器一样，光纤激光器一般由泵浦源，增益介质，谐振腔三个基本部分组成。泵浦源[2]供激励能量，增益介质是使粒子数反转并产生激光的物质体系，而谐振腔既要提供光学反馈条件，又要对激光器振荡波形选择和限制。但不同的是光纤激光器的增益介质是掺杂光纤，用光纤端面，光纤环形镜或光栅等作为反射镜来构成反射腔镜。

1.2 光纤激光器结构及泵浦耦合方式掺镱双包层光纤激光器的研究进展:http://www.751com.cn/wuli/lunwen_59493.html