基于光外差光谱技术的单频环形光纤激光器高分辨率温度传感器。

High-Resolution Temperature Sensor Based on Single-Frequency Ring Fiber Laser via Optical Heterodyne Spectroscopy Technology.

机构信息

Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Science and Technology (Ministry of Education), School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China.

Tianjin Key Laboratory of Film Electronic and Communication Device, College of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China.

出版信息

Sensors (Basel). 2018 Sep 27;18(10):3245. doi: 10.3390/s18103245.

DOI:10.3390/s18103245

PMID:30261692

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6210321/

Abstract

We demonstrate a high-resolution temperature sensor based on optical heterodyne spectroscopy technology by virtue of the narrow linewidth characteristic of a single-frequency fiber laser. When the single-frequency ring fiber laser has a Lorentzian-linewidth <1 kHz and the temperature sensor operates in the range of 3-85 °C, an average sensitivity of 14.74 pm/°C is obtained by an optical spectrum analyzer. Furthermore, a resolution as high as ~5 × 10 °C is demonstrated through optical heterodyne spectroscopy technology by an electrical spectrum analyzer in the range of 18.26⁻18.71 °C with the figure of merit up to 3.1 × 10⁵ in the experiment.

摘要

我们展示了一种基于光外差光谱技术的高分辨率温度传感器，该传感器利用单频光纤激光器的窄线宽特性。当单频环形光纤激光器的线宽<1 kHz 且温度传感器在 3-85°C 的范围内工作时，通过光谱分析仪获得平均灵敏度为 14.74 pm/°C。此外，通过电频谱分析仪在 18.26⁻18.71°C 的范围内利用光外差光谱技术，我们获得了高达~5×10⁻⁵的分辨率，实验中品质因数高达 3.1×10⁵。