复合和掺质浓度梯度激光晶体的设计、生长和性能研究-以Nd:YGG为例

项目名称： 复合和掺质浓度梯度激光晶体的设计、生长和性能研究-以Nd:YGG为例

项目编号： No.51272131

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 张怀金

作者单位： 山东大学

项目金额： 82万元

中文摘要： 高功率激光具有许多重要的应用。为了提高激光器的输出功率，人们进行了多种尝试，取得了良好的进展。采用复合结构的激光晶体来提高激光输出功率是一项重要的研究内容，但是有关复合晶体的制备技术目前还存在一定的问题。本项目提出一种复合和掺质浓度梯度晶体制备的新方法-光浮区法。以石榴石结构的掺钕Y3Ga5O12为研究对象，通过设计两段或三段复合晶体生长用料棒，采用光浮区法生长复合晶体，研究晶体的结构、组分、光谱特性，并进行激光实验研究。同时也设计的适合多段掺钕浓度梯度激光晶体的料棒，用光浮区法生长浓度梯度晶体，对生长的浓度梯度晶体进行结构、掺质浓度的测试等研究工作，进行激光研究。把光浮区生长晶体的经验可以推广到掺其他稀土离子和其他类型的激光晶体。 通过本课题研究，全面、系统地研究用光浮区法生长复合和浓度梯度激光晶体，并进行激光性能研究，充分挖掘该类晶体的特点，对于高功率激光研究具有重要意义。

中文关键词： 复合激光晶体；掺稀土浓度梯度激光晶体；光伏区法；激光输出；人眼安全激光

英文摘要： High power lasers have many important applications.Several methods have been tested in order to improve laser ourput power, and good results have been obtained. Composite crystal is a very important method to imporve laser output power, but there are some problems in obtaining composite crystals. A new method, optical floating zone method, is used to grow composite and doping concentration gradient crystal in this projiect. Taking Nd:Y3Ga5O12 as an example, composite crystals are grown by using optical floating zone method after the two or three segments polycrystalline rods are designed. The structure, component, spectra properties of as-grown crystals are studied, and laser output experiments are also perpromance. Doping concentration gradient crystals are also grown by using optical floating zone method after the concentration gradient polycrystalline rods are designed. The structure, component, spectra properties of as-grown gradient crystals are studied, and laser output experiments are also perpromance. The experience of crystal can be used to grow crystals doping other ions and other kinds of crystals. It is very important to study high power laser by this project by systematic researching the crystal grwoth and laser properties of composite and doping concentration gradient crystals.

英文关键词： Composite laser crystal；Re-doped concentration gradient laser crystal；optical floating zone method；laser output；eye-safe laser