回音壁微腔传输谱线与激光扫描速度关系的研究  

Research on the Relationship Between Transmission Spectra of Whispering-gallery-mode Microresonators and Laser Sweeping Speeds

作　　者：何晨芯 魏文清[1] 沈梅霞 叶明勇[1,2] 林秀敏[1,2] 

机构地区：[1]福建师范大学物理与能源学院,福建福州350117 [2]福建省量子调控与新能源材料重点实验室,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2016年第1期16-20,共5页Journal of Fujian Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61275215);福建省高校杰出青年科研人才培育计划项目(JA14070)

摘　　要：从理论上探讨了回音壁模式的传输谱线形状与激光扫描速度的关系,以及激光扫描速度对测量微腔Q值的影响.研究表明,在较低的激光扫描速度下,传输谱线为洛伦兹线型;但随着激光扫描速度的增大,会出现不同程度的振铃现象,并且振铃现象的明显程度还与耦合情况有关.结果还表明采用激光慢速扫频结合洛伦兹拟合方法得到的Q值是可靠的.The relationship between the shape of the transmission spectrum of the whispering gallery mode microresonator and the laser sweeping speed as well as the influence of the laser sweeping speed on the measurement of Q factor is theoretically investigated. It is shown that the transmission will have a Lorentz shape if the laser sweeping speed is low and a ringing phenomenon will be observed if the laser sweeping speed is fast enough, where the ringing phenomenon is also related to the coupling condition between the microresonator and the fiber taper. It is also shown that the method using a slow laser sweeping speed and Lorentz fitting to measure Q factors is reliable

关 键 词：回音壁微腔 扫描速度 传输谱线 

分 类 号：O436[机械工程—光学工程]