temperature and refractive index (RI), which is based on a no-core fiber (NCF) and fiber
Bragg grating (FBG). Two segments of NCF used as beam splitter and combiner are
embedded on the two ends of an FBG, which constitute a Mach-Zehnder (MZ) interferometer
susceptible to the temperature and an ambient RI. With the change of RI and temperature,
MZ interference and Bragg reflection result in the variation of transmission spectrum. The …