A cost-effective edge-filter based FBG interrogator using catastrophic fuse effect micro-cavity interferometers

This paper proposed an inexpensive high contrast in-line micro-cavity interferometer for edge-filter strain and temperature interrogation of a fiber Bragg grating sensor. The simulation model is presented in order to describe the sensor behavior which strongly agrees with the experimental results with a mean error lower than 0.04%. The results show evidences of high repeatability and stability achieved in measurements of strain and temperature from 0 to 1440 μStrain and 5 °C to 50 °C, respectively.