Enhancement of temperature measurement by using photonic bandgap effect

A novel temperature sensor by using photonic bandgap (PBG) effect is demonstrated. The solid core photonic bandgap fiber (PBGF) with infiltrated high refractive index solution is used for temperature measurement. It shows that the rising photonic bandgap edges of PBGF has a blue shifting of 120.54 nm when the ambient temperature was changing from 24 to about 64 °C. The sensitivity of the temperature measurement 3.01 nm/°C was achieved.