High sensitivity Fiber-Optic Current Sensor Based on Nested Fiber Grating

Abstract

Abstract: We proposed and demonstrated a novel fiber-optic current sensor based on a nested fiber grating, which is composed of Bragg grating and long period grating. The surface of the nested fiber grating was sputtered with a layer of high resistance Ni-Fe alloy. The current test shows that such a sensor has a high current sensitivity of 7.2×10-2 nm/mA. Its properties of the simple structure, compact size and low-cost imply that the proposed fiber current sensor is suitable for the fiber-optic current monitoring applications.

Key words: fiber and waveguide optics; fiber-optic current sensor; nested fiber grating; Ni-Fe alloy; wavelength shift

CLC Number:

TN253

Li Hefei, Xu Cuiping , Tian Chunyu, Gong Kui, Feng Fei，Xu Feng，Zhen Shenglai, Yu Benli. High sensitivity Fiber-Optic Current Sensor Based on Nested Fiber Grating[J]. J4, 2016, 33(5): 598-603.

References

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