Simultaneous measurement of multiple parameters using a single fiberBragg grating

摘要

A novel approach for simultaneous measurement of chirp (any parameter that can induce strain gradient on FBG) and temperature using a single FBG is proposed. Change in reflectivity at central wavelength of FBG reflection & Bragg wavelength shifts induced due to temperature were used for chirp & temperature measurements respectively. Theoretical resolution limit for chirp and temperature using an Optical Spectrum Analyzer (OSA) with lpm wavelengthresolution and >58dB dynamic range are 12.8fm and 1/13 °C respectively.