Research and Implementation on Temperature and Humidity Measurement System Based on FBG

In the paper, we design a distributed fibber Bragg grating temperature and humidity measurement system, the clock pulse broadband light source, combined with time division and wavelength division multiplexing fiber Bragg grating sensor network technology, we will can solve complex problems with addressing to fiber Bragg grating, change of the PI film coating for the humidity, we propose a non-power temperature and humidity sensors. The use of arrayed waveguide grating sensor signal demodulation technology, through theoretical analysis confirmed the feasibility of the system. System for temperature and humidity measuring range (20 similar to 80) degrees C, (10 similar to 90) % RH measurement accuracy is achieved within +/- 0.2 degrees C and +/- 5% RH for real-time measurement.