Multi-functional optical fiber sensor system based on a dense wavelength division multiplexer**Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0402504), the National Natural Science Foundation of China (Grant Nos. 61875069 and 61575076), Hong Kong Scholars Program, China (Grant No. XJ2016026), and the Science and Technology Development Plan of Jilin Province, China (Grant Nos. 20190302010GX

Abstract

We propose a novel and efficient multi-functional optical fiber sensor system based on a dense wavelength division multiplexer (DWDM). This system consists of an optical fiber temperature sensor, an optical fiber strain sensor, and a 48-channel DWDM. This system can monitor temperature and strain changes at the same time. The ranges of these two sensors are from −20 °C to 100 °C and from −1000 to 2000 , respectively. The sensitivities of the temperature sensor and strain sensor are 0.03572 nm/°C and 0.03808 nm/N, respectively. With the aid of a broadband source and spectrometer, different kinds and ranges of parameters in the environment can be monitored by using suitable sensors.