對ndyag固體激光器輸出1.444微米激光的研究

1、 I分類號 密級 UDC 注 1 學 位 論 文 對 Nd:YAG 固體激光器輸出 固體激光器輸出 1.444 微米 微米 激光的研究 激光的研究 （題名和副題名） 牛瑞華 牛瑞華 （作者姓名） 指導教師姓名 吳 健 健 教授、博

2、導 教授、博導 電子科技大學 電子科技大學 成 都 （職務、職稱、學位、單位名稱及地址） 申請學位級別 碩 士 專業(yè)名稱 光 學 論文提交日期 2005.1 2005.1 論文答辯日期 2005.3 2005.3 學位授予單位和日期 電子科技大學 電子科技大學 答辯委員會主席 評閱人

3、 2005 年 1 月 24 日 注 1：注明《國際十進分類法 UDC》的類號 II ABSTRACT Owing to m µ 444 . 1laser generated by Nd:YAG solid-state laser have marked advantages, people are paying more attention to it. m µ 444 . 1laser ar

4、e widely used in scientific research, production, iatrology and military owing to its safety to eyes, strongly absorbed characteristic in water and putting out middle infrared laser with m µ 064 . 1laser. Recently,

5、more and more people are studying m µ 444 . 1laser in China, however, the technology is unmatured, especially the pulse energy is low which greatly limits its application. This paper includes systematic analysis to

6、 basic theory of Nd:YAG solid-state laser, the optimum design of laser and output of m µ 444 . 1laser by the dispersive prism resonator. The primary content reads as follows: Firstly, we further analyze the running

7、mechanism of four-level system Nd:YAG laser using the theory of velocity equation, the energy level configuration and spectrum characteristic of Nd:YAG crystal. What’s more, we make a comparison between m µ 444 . 1

8、and the other’s stimulated cross sections , and estimate the output difficulty of m µ 444 . 1laser. Secondly, on the basis of lenses’ structure, we design the line resonator and the flexura resonator, and the exper

9、iments indicate that it is impossible to generate m µ 444 . 1laser only using lenses. Then we draw useful lessons from the experiments , reasonably design the dispersive prism resonator and succeed in generating m

10、µ 444 . 1laser through Nd:YAG crystal of m µ 064 . 1 . In the experiment, we bring forward a better project to precisely adjust azimuth angle of the prism and holophote. Lastly, we systematically analyze the e

11、xperimental results and draw a conclusion that the pulse energy of m µ 444 . 1laser is much lower than the others’, which indicates the stimulated cross section of m µ 444 . 1laser is much smaller. Using the

12、Nd:YAG solid-state laser , we achieve several laser wavelengths such as m µ 414 . 1 , m µ 357 . 1 , m µ 338 . 1 , m µ 318 . 1 , m µ 064 . 1by inching the holophote. Besides, we discuss the pr