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Non-Hermite singular point optical microcavity magnetic field sensor

A magnetic field sensor and optical microcavity technology, applied in the field of magnetic field sensors, can solve the problems of insufficient sensitivity and insufficient precision, and achieve the effects of improving sensitivity, eliminating interference and reducing volume

Pending Publication Date: 2022-07-29
ZHEJIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

Compared with magnetic measurement methods based on other principles, optical magnetic measurement has broad prospects because of its excellent characteristics such as good reliability, compact structure, small size, and stability without electromagnetic interference. Questions that do not meet the requirements

Method used

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  • Non-Hermite singular point optical microcavity magnetic field sensor
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  • Non-Hermite singular point optical microcavity magnetic field sensor

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Embodiment Construction

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] 【like figure 1 As shown, the specifically implemented magnetic field sensor] includes a broad-spectrum light source 1, a mode spot converter 2, a one-way isolator 3, a magnetic field sensitive unit 4 and a miniature spectrometer 5 in the package casing 6; the output ends of the broad-spectrum light source 1 are sequentially After the mode spot converter 2 and the one-way isolator 3 are connected to the input end of the magnetic field sensitive unit 4, the output end of the magnetic field sensitive unit 4 is connected to the miniature spectrometer 5; the broad-spectrum light source 1, the mode spot converter 2, the one-way isolation Both the device 3 and the micro-spectrometer 5 are located on the upper surface of the silicon dioxide buffer layer 44, the light transmission part in the magnetic field sensitive unit 4 is formed by etching the lithium ...

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Abstract

The invention discloses a non-Hermite singular point optical microcavity magnetic field sensor. The output end of the wide-spectrum light source is connected with the input end of the magnetic field sensing unit after sequentially passing through the spot size converter and the one-way isolator, and the output end of the magnetic field sensing unit is connected with the micro spectrometer; the magnetic field sensing unit comprises an input / output waveguide, two same 8-shaped waveguide microcavities and a magnetostriction material layer, the two 8-shaped waveguide microcavities are arranged on the same side of the input / output waveguide in a coupling manner, and each 8-shaped waveguide microcavity comprises a middle cross waveguide and two split ring waveguides; the cross waveguide is formed by vertically and orthogonally crossing two straight waveguides at respective midpoints, the two straight waveguides are respectively connected with two ends of the two split ring waveguides, and a magnetostriction material layer is arranged below the 8-shaped waveguide microcavity. According to the invention, a second-order non-Hermite system is constructed, and the advantage of high singular point detection sensitivity of the non-Hermite system is utilized, so that the device has the characteristics of small size and easiness in packaging and integration.

Description

technical field [0001] The invention relates to a magnetic field sensor in the field of integrated optics and magnetic field detection, in particular to a non-Hermitian singular point optical microcavity magnetic field sensor. Background technique [0002] Magnetic field sensors are devices that can convert various magnetic fields and their varying amounts into intuitive signal outputs. Magnetic fields are closely related to many aspects of nature and human social life. The magnetic field generated by artificially arranged permanent magnets can be used as a carrier of many kinds of information. Therefore, the tasks of detecting, collecting, storing, converting, and monitoring the magnetic field and various information contained in it fall on the magnetic field sensor. Magnetic field sensor has become an indispensable basic element in information technology and information industry in the information society. At present, people have developed various magnetic field sensors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
CPCG01R33/0327G01R33/032
Inventor 佘玄黄飞孙培基毕然陈侃舒晓武
Owner ZHEJIANG UNIV
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