The linear birefringence (LB) is caused by the different phase retardation (retardance) of two linearly polarized eigenstates of light passing through the material. Birefringence was a significant parameter of an optical material in optical area. Compared with the traditional birefringence measurement method such as modulation technique, a novel birefringence measurement method of magnetic fluid (MF) using all optical fiber based on a Hi-Bi non-adiabatic tapered optical fiber (HBT) sensor in fiber loop mirror (FLM) was proposed in this letter. The sensitivity and detection limit of the sensor in this set up was enhanced[1]. Moreover, it was stability, strong resistance to disturbance, easy assembly, and achievement.

© 2019 IEEE

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