用于折射率传感的液芯光学环形谐振器的设计与优化。

Design and optimization of liquid core optical ring resonator for refractive index sensing.

作者信息

Lin Nai, Jiang Lan, Wang Sumei, Xiao Hai, Lu Yongfeng, Tsai Hai-Lung

机构信息

Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China.

出版信息

Appl Opt. 2011 Jul 10;50(20):3615-21. doi: 10.1364/AO.50.003615.

DOI:10.1364/AO.50.003615

PMID:21743574

Abstract

This study performs a detailed theoretical analysis of refractive index (RI) sensors based on whispering gallery modes (WGMs) in liquid core optical ring resonators (LCORRs). Both TE- and TM-polarized WGMs of various orders are considered. The analysis shows that WGMs of higher orders need thicker walls to achieve a near-zero thermal drift, but WGMs of different orders exhibit a similar RI sensing performance at the thermostable wall thicknesses. The RI detection limit is very low at the thermostable thickness. The theoretical predications should provide a general guidance in the development of LCORR-based thermostable RI sensors.

摘要

本研究对基于液芯光环行器（LCORR）中回音壁模式（WGM）的折射率（RI）传感器进行了详细的理论分析。考虑了各种阶次的TE偏振和TM偏振WGM。分析表明，高阶WGM需要更厚的壁才能实现接近零的热漂移，但在热稳定壁厚下，不同阶次的WGM表现出相似的RI传感性能。在热稳定厚度下，RI检测限非常低。这些理论预测应为基于LCORR的热稳定RI传感器的开发提供一般指导。