Abstract
AbstractFor 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 R2 = 0.98739, with the advantages of high sensitivity, simple manufacturing, and low cost can be applied in the field of bioincubation temperature monitoring.
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