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Vector magnetic field sensor based on side-polished fiber surface plasmon resonance and manufacturing and detection method thereof

A surface plasmon and vector magnetic field technology, which is applied in the use of magneto-optical equipment for magnetic field measurement, magnetic field size/direction, single-device manufacturing, etc., to achieve the effects of high sensitivity and linearity, improved sensitivity, and high-sensitivity sensing.

Pending Publication Date: 2019-03-29
JINAN UNIVERSITY
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Problems solved by technology

However, a high-performance vector magnetic field sensor prepared by combining the side-throwing optical fiber with SPR and magnetic fluid and utilizing the high sensitivity of SPR technology has not yet appeared.

Method used

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  • Vector magnetic field sensor based on side-polished fiber surface plasmon resonance and manufacturing and detection method thereof
  • Vector magnetic field sensor based on side-polished fiber surface plasmon resonance and manufacturing and detection method thereof
  • Vector magnetic field sensor based on side-polished fiber surface plasmon resonance and manufacturing and detection method thereof

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Embodiment

[0031] A vector magnetic field sensor based on surface plasmon resonance of a side-polished optical fiber, comprising a side-polished optical fiber, a metal film disposed on a polished area, a magnetic fluid, a light source, and a spectrometer for detecting a transmission spectrum, the polished optical fiber It is manufactured by polishing off the cladding on one side of the optical fiber; the polished optical fiber is provided with a glass capillary and optical ultraviolet glue, and the magnetic fluid is sealed and wrapped around the polished optical fiber through the glass capillary and optical ultraviolet glue.

[0032] Its working principle: under the action of a magnetic field, when the incident light is parallel to the direction of the magnetic field, the nanoparticles in the magnetic fluid gather into high-density nanogroups; when the incident light is perpendicular to the direction of the magnetic field, the nanoparticles in the magnetic fluid gather into low-density nan...

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Abstract

The invention relates to the technical field of optical fiber magnetic field sensor, and specifically discloses a vector magnetic field sensor based on side-polished fiber surface plasmon resonance and a manufacturing and detection method thereof. The vector magnetic field sensor comprises a side-polished fiber, a metal film plated on a polishing zone, a magnetic fluid, a light source, and a spectrometer for detecting a transmission spectrum. The polished fiber is made by polishing a part of the cladding and the core of an optical fiber, and is provided with a glass capillary and an optical UVglue. The magnetic fluid is wrapped in seal around the polished fiber via the glass capillary and the optical UV glue. The invention utilizes the surface plasmon resonance (SPR) effect to form a resonance trough (the lowest transmitted light intensity) in the transmission spectrum. In the different magnetic field strengths or magnetic field directions, the refractive index of the magnetic fluid above the metal film is different, which results in the difference of the SPR resonance trough position. The sensing characteristics of the sensor on the direction and intensity of the magnetic field can be calibrated by recording the drift of the resonance spectrum.

Description

technical field [0001] The invention relates to the technical field of optical fiber magnetic field sensors, in particular to a vector magnetic field sensor based on surface plasmon resonance of a side-throwing optical fiber and a preparation and detection method thereof. Background technique [0002] Sensing technology, communication technology and computer technology together constitute the three pillars of the modern information industry, which play the roles of "sense", "nerve" and "brain" in the information system respectively. Among them, sensing technology, as a key component of information acquisition, is the basis for subsequent information transmission and processing, and its importance is self-evident. [0003] As an important branch of the modern sensor field, fiber optic sensors have unique features such as small size, light weight, high sensitivity, large dynamic range, low power consumption, easy reuse, easy remote monitoring, strong robustness, corrosion resi...

Claims

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Application Information

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IPC IPC(8): G01R33/032
CPCG01R33/0052G01R33/032
Inventor 陈耀飞罗云瀚陈哲董江莉蒋竹鹏孙伟婷卢惠辉关贺元张军
Owner JINAN UNIVERSITY
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