Research on Photonic Crystal Optical Fiber Sensor Based on Surface Plasmon Resonance Technology
In order to realize the high sensitivity detection of the measured medium refractive index,a photonic crystal optical fiber refractive index sensor based on surface plasmon resonance technology is designed and studied.The air holes in the inner and outer layers of the sensor are arranged in hexagonal manner,the outer wall of the cladding is coated with silver graphene nanofilms,the change of refractive index of the surrounding environment is detected by the coupling degree between the fiber core base mode and the surface plasma mode.Research shows that,the sensor can detect the refractive index in the range of 1.37-1.38,the maximum sensitivity of 40000 nm/RIU can be achieved,and the resolution of 4.17×10-5 RIU can be achieved.
photonic crystal optical fibersurface plasmon resonancerefractive index sensor
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