Effects of Temperature Changes on the Transmission Spectra of Tilted Fiber Bragg Grating

Based on mode coupling theory, Tilted Fiber Bragg Grating temperature sensing principle and the characteristics of transmission spectra have been proposed. The temperature shift of fundamental modes resonance wavelengths and high - order modes resonance wavelengths were investigated by means of simulation method. The tilted angle on the effect of resonance wavelengths was discussed. The results show that the different resonance wavelengths are linearity increased with ambient temperatures. The fundamental modes are more sensitive than the high-modes ones. The conclusion has certain significance for TFBG fabrication.