MZI interferometric fiber optic temperature sensor based on MFC

Abstract

For biological embryo incubation, it is very important to monitor temperature accurately, so a new Mach-Zder interference (MZI) fiber temperature sensor is based on a microfiber coupler (MFC). It consists of a 3 dB fiber coupler and MFC forming an MZI structure. Since the MFC has strong evanescent field properties, higher sensitivity can be generated when fully acting with the external temperature environment. The experimental results show that the optical fiber sensor has good temperature response properties in the temperature range of 24-38°C, and the temperature sensitivity increases rapidly as the MFC waist diameter decreases. The maximum wavelength sensitivity of approximately 191.93 pm/°C and R 2 = 0.98739, with the advantages of high sensitivity, simple manufacturing, and low cost can be applied in the field of bioincubation temperature monitoring.

High-Sensitivity Temperature Sensor Based on Fiber Fabry-Pérot Interferometer with UV Glue-Filled Hollow Capillary Fiber

“…The optical fiber interferometers in applying temperature sensing mainly include the Fabry-Pérot interferometer (FPI) [ 9 , 10 ], the Mach-Zehnder interferometer [ 11 , 12 ], the Michelson interferometer [ 13 ] and the Sagnac interferometer [ 14 , 15 ]. Among them, temperature sensors based on FPI are widely reported in practical applications owing to their simple principle, rapid response, convenient manufacturing methods and good mechanical properties.…”