[心理学]侧面抽运论文：LD侧面抽运高重频134μm激光器研究.doc

侧面抽运论文：LD侧面抽运高重频1.34m激光器研究【中文摘要】LD侧面抽运高重频1.34m激光器糅合了固体激光器的结构紧凑、高效率、寿命长等优点。加之其为人眼安全波段,使其在光谱学、光纤光学、激光医疗、光通信和军事应用等众多领域都有广泛的应用。目前针对1.34m在抽运方式上多为LD端面抽运,尚没有LD侧面抽运增益介质实现1.34gm激光高重频输出的报道。端面抽运的局限性在于无法实现高功率输出。为此,本文提出了一种LD侧面抽运Nd:YAP增益介质,使用V:YAG被动调Q获取1.34m激光的新方法。实验中通过LD侧面抽运Nd:YAP晶体获得了1.34m基频光,在腔内加入初始透过率适合的V:YAG晶体,实现了1.34m激光高重频输出。主要研究内容综述如下：(1)首次使用LD侧面抽运Nd:YAP/V:YAG被动调Q获得了1.34mn高重频激光输出。(2)首次建立了V:YAG被动调Q初始透过率、输出镜反射率和激光增益的归一化关系优化曲线,并依据抽运条件等确定了V:YAG被动调Q晶体的最佳初始透过率和晶体尺寸。为选取晶体提供了可靠的理论支持,保证了实验能够准确如期的完成。(3)根据V:YAG晶体的物化性质,分析给出了晶向极化方向与激光偏振方向夹角和饱和吸收体基态、激发态吸收截面之间的变化关系。设计了可旋转式调Q水冷盒。(4)利用高斯光束ABCD传输矩阵优化了腔型设计,实验研究了V:YAG被动调Q晶体的初始透过率对连续1.34m被动调Q激光输出特性的影响,获得了1.34m激光输出脉宽、输出功率、重复频率与抽运光功率、V:YAG被动调Q晶体的初始透过率等之间的关系。(5)在V:YAG被动调Q晶体的初始透过率为95%,抽运光功率为811W时,获得了最大平均输出功率3.95W,光光转换效率0.49%,最高峰值功率1328W的高重频1.34tm激光输出。相应的重复频率为14.3kHz,脉冲宽度208ns。【英文摘要】1.34m high repetition rate generated by LD side-pumped laser has the advantages of compactness, high efficiency and long lifetime. Because 1.34m is the safety wave range for human, it is widely used in the fields of Spectroscopy, fiber optics, laser medicine, optical communications and military applications. At the present,1.34m laser is obtained by end-pumped. There is no report about LD side-pumped gain medium to get high repetition rate at 1.34m laser. As the limitation of end pumped, that can not achieve high power output laser. As a matter of fact, this paper refers a new method to obtain 1.34m, which is LD side-pumped Nd:YAP crystal by using V:YAG as passively Q-switched crystal. In the experiment, LD side-pumped Nd:YAP has been used to obtain high repetition rate 1.34m laser. V:YAG was inserted in the resonant by property initial transmission. High repetition rate laser at 1.34m was obtained. The main theoretical and experimental research contents are completed as follows:(1) This is the first time to realize diode-side-pumped passively Q-swiched Nd:YAP laser at 1.34m with V3+:YAG saturable absorber.(2)Its the first time to calculate optimum curve of initial transmission of the passively Q-switched crystal V3+:YAG, mirror reflectivity efficiency and laser gain, which is helpful for choosing the passively Q-switched crystal. It makes us complete the experiment in timely.(3) According to properties of V3+:YAG on physical and chemical, the relationship of angle between polarization direction of V3+:YAG and the laser polarization direction, excited state absorption cross section and ground state absorption cross section is investigated. And we designed the Q-box, which can be rotated.(4) The cavity design is optimized by the ABCD transmission matrix of Gaussian beam. The influence between initial transmission of V3+:YAG to the passively Q-swiched laser at 1.34m was investigated with experimental research. The relationship of pulse repetition frequency, pulse width、output power with pump power and initial transmission of V3+:YAG was obtained.(5) For the passive Q-switching operation, the maximum average output power of 3.95W was achieved under the pump power of 811W, corresponding to optical-to optical conversion of 0.49%. The highest peak power,the highest pulse repetition frequency and the shortest pulse width was achieved to be 1328W,14.3kHz,208ns respectively.【关键词】侧面抽运 1.34m高重频 Nd:YAP/V:YAG【英文关键词】side-pumped high repetition at 1.34m Nd:YAP/V:YAG【目录】LD侧面抽运高重频1.34m激光器研究摘要4-5ABSTRACT5目录6-7第一章 引言7-151.1 LD连续抽运固体激光器发展概述71.2 1.34m激光器的研究意义7-81.3 高重频1.34m激光器的研究进展8-121.4 1.34m高重频激光技术12-131.5 全文内容概述13-15第二章 被动调Q晶体对比分析及调Q器件的设计15-272.1 V:YAG、Cr:YAG、Co:LMA晶体的光谱特性与能级结构15-192.2 V:YAG参数的确定19-252.3 被动调Q水冷盒的设计25-27第三章 LD侧面连续抽运1.34m激光被动调Q理论研究27-353.1 LD侧面连续抽运1.34m激光的调Q原理27-293.2 连续抽运的V:YAG晶体被动调Q速