Photonic Sensors, 2016, 6 (4): 318, Published Online: Oct. 21, 2016
Cost-Effective Fiber Multiplexing System Based on Low Coherence Interferometers and Application to Temperature Measurement
Abstract
Based on the low-coherence interferometric principles, a cost-effective all-fiber Mach-Zehnder multiplexing system is proposed and demonstrated. The system consists of two interferometers: sensing interferometer and demodulation interferometer. By scanning an optical tunable delay line back and forth constantly with a stable speed, sensing fibers with different optical paths can be temporal interrogated. The system is experimentally proved to have a high performance with a good stability and low system noises. The multiplexing capacity of the system is also investigated. An experiment of measuring the surrounding temperature is carried out. A sensitivity of 12 μm/℃ is achieved within the range of 20 ℃ to 80 ℃. This low cost fiber multiplexing system has a potential application in the remote monitoring of temperature and strain in building structures, such as bridges and towers.
Meng JIANG, Zhongze ZHAO, Kun LI, Zeming WANG, Yage ZHAN, Hongying ZHOU, Fu YANG. Cost-Effective Fiber Multiplexing System Based on Low Coherence Interferometers and Application to Temperature Measurement[J]. Photonic Sensors, 2016, 6(4): 318.