用于无自旋交换弛豫机制磁力计泵浦的微结构自加热碱金属激光器

项目名称： 用于无自旋交换弛豫机制磁力计泵浦的微结构自加热碱金属激光器

项目编号： No.61505212

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李志永

作者单位： 中国科学院电子学研究所

项目金额： 20万元

中文摘要： 结构紧凑且性能稳定的碱金属激光器在无自旋交换弛豫机制（SERF）的原子磁力计泵浦领域具有较好的应用前景。本项目以微结构自加热的碱金属激光器为研究对象，使用未被利用的泵浦光加热微型化气室，实现微结构碱金属激光器的线偏振瓦级功率输出，为SERF磁力计提供优质的泵浦源。微结构激光器采用双端泵浦结构，蒸气室利用硅片和玻璃的阳极键合技术实现，在蒸气室两端贴附吸光片，吸光片对未被利用的泵浦光强吸收，实现对蒸气室的自加热。本项目还将按照“增益区温度变化→折射率变化→光程变化→单频光相位变化”的思想，基于相位外差探测的方法，使用单频激光器搭建在线快速测量碱金属激光器增益区温度分布的实验装置，系统研究影响自加热的各个因素之间的内在联系。本项目研究工作的开展，将能够有力推动小功率碱金属激光器的应用，有助于提高SERF态原子的体积和均匀度。

中文关键词： 气体激光器；碱金属激光器；无自旋交换弛豫机制磁力计泵浦；微结构激光器

英文摘要： Compact and dependable alkali lasers have bright prospects in the pumping of spin-exchange relaxation-free (SERF) atomic magnetometer. This project involves a micro-fabricated and self-heated alkali laser. The laser, which utilizes the unabsorbed pumping light as the heater of the micro-fabricated cell, has the features of linear polarization and output power of Watt level. The laser can serve as a good pumping source for a SERF magnetometer. The laser is pumped at double ends, and the alkali cell is fabricated by anodic bonding of glasses and silicon. Two pieces of pumping light absorber are attached tightly to the cell in order to self-heating. Based on the concept “active region temperature varies → refractive index varies → optical path varies → laser phase varies”, a novel method for measuring the active region temperature will be developed. The method will be used to research the intrinsic relationships among the factors affecting the self-heating. The researches in this project will push forward the applications of low-power alkali lasers and contribute to improve the volume and uniformity of SERF atoms.

英文关键词： gas laser;alkali laser;pumping of spin-exchange relaxation-free magnetometer;micro-fabricated laser