Fiber up-taper assisted Mach-Zehnder interferometer for high sensitive temperature sensing  

作　　者：Lili MAO Qizhen SUN Ping LU Zefeng LAO Deming LIU 

机构地区：[1]National Engineering Laboratory for Next Generation Intemet Access System, Huazhong University of Science and Technology, Wuhan 430074, China [2]College of Optical and electronic information, Huazhong University of Science and Technology, Wuhan 430074, China [3]College of Electrical and electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Frontiers of Optoelectronics》2015年第4期431-438,共8页光电子前沿（英文版）

基　　金：Acknowledgements This work was supported by the National Natural Science Foundation of China （Nos. 61275083 and 61290315） and the Fundamental Research Funds for the Central Universities （HUST： No. 2014CG002）.

摘　　要：A new in-line Mach-Zehnder interferometer （MZI） sensor consisting of a stub of multi-mode fiber and an up-taper was proposed and demonstrated. Temperature measurement can be carried out by detecting wavelength shift. Dependency of sensitivity on interferometer length and dip wavelength was discussed. Experimental results showed a maximum temperature sensitivity of 113.6pm/℃ can be achieved, which is superior to most fiber temperature sensors based on in-line MZIs within the range from 20℃ to 80℃, also a good mechanical strength can be obtained. The proposed sensor is a good candidate for temperature measurement, due to the advantages of simple structure, easy fabrication, cost- effective and high sensitivity.A new in-line Mach-Zehnder interferometer （MZI） sensor consisting of a stub of multi-mode fiber and an up-taper was proposed and demonstrated. Temperature measurement can be carried out by detecting wavelength shift. Dependency of sensitivity on interferometer length and dip wavelength was discussed. Experimental results showed a maximum temperature sensitivity of 113.6pm/℃ can be achieved, which is superior to most fiber temperature sensors based on in-line MZIs within the range from 20℃ to 80℃, also a good mechanical strength can be obtained. The proposed sensor is a good candidate for temperature measurement, due to the advantages of simple structure, easy fabrication, cost- effective and high sensitivity.

关 键 词：fiber sensor Mach-Zehnder interferometer（MZI） multimode fiber （MMF） up-taper 

分 类 号：TH744.3[机械工程—光学工程] TP212.11[机械工程—仪器科学与技术]