Research on double parameters measurement technology based on optical fiber bragg grating

Double parameters measurement technology of pressure and temperature is presented in this paper based on Optical Fiber Bragg Grating (FBG.). The device of FBG double parameters measurement technology based on equal intensity beam is designed, which can measure the pressure and temperature at the same time. Experimental research and error analysis indicate that cross sensitivity between stress and temperature of fiber grating can influence less measuring results. The smaller measuring range is, the less the error of stress and temperature caused by cross sensitivity is.