Temperature-self-reference photonic crystal fiber surface plasma resonance magnetic field sensor

Abstract

The invention relates to a temperature-self-reference photonic crystal fiber surface plasma resonance magnetic field sensor. The sensor comprises a D-type photonic crystal fiber body and a magnetic fluid layer; the top of the D-type photonic crystal fiber body is polished to form a polished plane, a gold film layer is plated on the polished plane, and the magnetic fluid layer is applied on the gold film layer; the D-type photonic crystal fiber body comprises a silicon dioxide cladding and 21 air holes positioned in the silicon dioxide cladding; four layers of air holes are formed upwards from the bottom of the D-type photonic crystal fiber body; the circle centers of the air holes in each layer are positioned on the same straight line; the inner wall of the third air hole in the third layer is plated with a gold film, and the third air hole is filled with polydimethylsiloxane. The D-type photonic crystal fiber is combined with the SPR technology to measure the magnetic field, and the problems that a magnetic field sensor is large in size, low in sensitivity and the like are solved; and a mode of plating the gold film in the D-type photonic crystal fiber and filling the D-type photonic crystal fiber with the magnetic fluid and PDMS is adopted, so that simultaneous measurement of the magnetic field and the temperature by the sensor is realized.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and relates to a temperature self-referencing photonic crystal optical fiber surface plasmon resonance magnetic field sensor. Background technique [0002] In recent years, magnetic field sensing technology has developed rapidly and has been widely used in aerospace, medicine, submarine environment detection, geological exploration and power systems. For example, in power systems, equipment or systems need to work normally in their electromagnetic environment , so whether it is the ability of the equipment to withstand interference or the interference generated by the equipment to the environment, it needs to be measured by means of measurement. However, traditional electrical magnetic field sensors have problems such as large size and low sensitivity, while optical fiber magnetic field sensors have the advantages of small size, corrosion resistance, high sensitivity and high precisi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a temperature self-referencing photonic crystal fiber surface plasmon resonance magnetic field sensor to solve the problems of low magnetic field sensitivity of the existing optical fiber magnetic field sensor, and the sensor is susceptible to temperature interference and affects the magnetic field sensitivity.

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