Research On Photonic Crystal Fiber Sensor With High Sensitivity

In recent years,photonic crystal fiber sensor based on surface plasmon resonance have solved the phase matching problem and the liquid filling problem.Because of its small size,high sensitivity and flexible design,it has broad application prospects in system integration and remote sensing.The"Internet+"plays a guiding role in the application scenarios of sensors.The software structure of browser/server can reduces the difficulty of client development,and greatly facilitates the realization of data sharing.In this paper,photonic crystal fiber sensors are divided into four categories according to the coating,and the characteristics of these four types of optical fiber sensors are summarized.Three photonic crystal fiber sensors with high sensitivity detection,high dynamic refractive index detection range and simplified analyte filling operation are studied in combination with application of optical fiber sensors.Firstly,the D-shaped photonic crystal fiber sensor with elliptical air holes is studied.The wavelength sensitivity and amplitude sensitivity of 10200nm/RIU and 501.92 RIU^-1 are achieved by adjusting the air hole parameters and polishing depth.Secondly,the dual-core photonic crystal fiber sensor is studied,and the high dynamic detection range of refractive index is achieved by combining the surface plasmon resonance and coupling theory.After optimizing the parameters,the envelope of the liquid hole is tangent with the air hole in the first layer of the core cladding.The sensitivity is 4028 nm/RIU,and the R² value is 0.99822,which means good linearity is obtained.Thirdly,the photonic crystal fiber sensor with reuleaux triangle is studied.A liquid core with lower refractive index is introduced and a more sensitive optical fiber sensor is obtained by increasing the the arc radius.Furthermore,the analyte can be conveniently filled in the channel without affecting the resonance peak position.The maximum wavelength sensitivity is 10200 nm/RIU and the resolution is 9.8?10^-6 RIU.Finally,a small-scale query platform with raw data is built by using web technology.Researchers in the LAN can access the data and documents of the specified resources through browser,and upload their own research data,which makes it easier to visually display and share the data.The results can be used as a reference for the design of novel photonic crystal fiber sensors.These sensors will play an important role in the field of biological detection,toxic and harmful organic substances detection and food safety detection.