Optical fiber fluorescent all-optical magnetic field sensor and system

Abstract

The invention discloses an optical fiber fluorescent all-optical magnetic field sensor and a sensing system. The sensor comprises an optical fiber and a nano-diamond NV color-centered fluorescent layer which is arranged at one end of the optical fiber. The nano-diamond NV color-centered fluorescent layer is attached to one end of the optical fiber through the optical glue. The optical fiber comprises an inner optical fiber core and the nano-diamond NV color center is arranged at one end of the optical fiber through being embedded at one end of the optical fiber core. According to the invention, only optical signals in the optical fiber are measured based on the sensor technology. Therefore, the measurement response frequency is high, and the core structure is simple.

Description

technical field [0001] The invention belongs to the field of optical fiber fluorescence sensors, and further relates to an optical fiber fluorescence all-optical magnetic field sensor and an optical fiber fluorescence all-optical magnetic field sensing system. Background technique [0002] Optical fiber sensors are widely used in the measurement of physical quantities such as displacement, vibration, rotation, pressure, bending, strain, speed, acceleration, current, magnetic field, voltage, humidity, temperature, sound field, flow, concentration, PH value and strain. Among the main reasons for the widespread application in the current information age, there are three important ones. One is because the optical fiber has many excellent material properties, such as: anti-electromagnetic and atomic radiation interference performance, thin diameter, soft, light mechanical properties; electrical properties of insulation, no induction; water resistance, high temperature resistance,...

AI Technical Summary

Problems solved by technology

[0003] However, the existing optical fiber magnetic field sensing technology in optical fiber sensing technology often needs to add magnetostrictive materials and magnetic nanoparticle materials into or around the optical fiber, and use the conversion of magnetic field to deformation to read the deformation information with light, or magnetic field Drive particle redistribution resulting in changes in the refractive index of light around or within the fiber core

However, the above-mentioned added materials often bring potential safety hazards or pollutants (heat generation by induction current, diffusion pollution by magnetic particles) in special application environments (such as high-voltage substations and other environments with high-intensity induction electromagnetic fields), and most of the core The structure of the device is complex, and it is also susceptible to environmental interference such as temperature

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