ZHANG Hongling,ZHANG Fang,CONG Bitong,QI Yuefeng.Research on Michelson interference refractive index sensing technique based on double-core microfiber[J].Optoelectronics Letters,2021,17(9):513-517 Research on Michelson interference refractive index sensing technique based on double-core microfiber Author Name Affiliation ZHANG Hongling  School of Information Science and Engineering,Yanshan University, Qinhuangdao 066004, China Zhangjiakou Key Laboratory for Intelligent Architecture, Hebei University of Architecture, Zhangjiakou 075000,China  ZHANG Fang  School of Information Science and Engineering,Yanshan University, Qinhuangdao 066004, China Department of Information Engineering, Hebei University of Environmental Engineering, Qinhuangdao 066004, Chi-na  CONG Bitong  School of Information Science and Engineering,Yanshan University, Qinhuangdao 066004, China  QI Yuefeng  School of Information Science and Engineering,Yanshan University, Qinhuangdao 066004, China  Abstract:       We propose a novel refractive index sensor based on Michelson interferometer by using double-core microfiber. Through the reflection of the end and taper of double-core fiber (DCF), the Michelson interference spectrum is formed. Owing to the structure characteristic of double-core microfiber, this interferometer can achieve the measurement of refractive index (RI) and temperature. The experimental results show that the refractive index sensitivity of the interferometer is 2 377.80 nm/RIU at the diameter of the taper waist of 8.76 ?m. In the temperature ranges from 30 °C to 60 °C, the temperature sensitivity is 0.070 48 nm/°C. This sensor has the advantage of high refractive index sensitivity. Hits: 794 Download times: 102 View Full Text    Download reader