Refractive index sensor based on optical fiber end face using pulse reference-based compensation technique

摘要

We proposed a refractive index sensor based on optical fiber end face using pulse reference-based compensation technique. With good compensation effect of this compensation technique, the power fluctuation of light source, the change of optic components transmission loss and coupler splitting ratio can be compensated, which largely reduces the background noise. The refractive index resolutions can achieve 3.8×10~(-6)RIU and 1.6 × 10~(-6)RIU in different refractive index regions.