Optical resonant cavity alternating magnetic field sensing system based on triple resonance and use method

A technology of optical resonant cavity and alternating magnetic field, which is applied in the direction of the size/direction of the magnetic field, and the use of magneto-optical equipment for magnetic field measurement. It can solve the problems of limited bandwidth and insufficient sensitivity of optical sensors, and achieve small size and easy integration. , the effect of high sensitivity

Active Publication Date: 2021-07-27
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, existing optical sensors still have problems such as limited bandwidth and insufficient sensitivity.

Method used

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  • Optical resonant cavity alternating magnetic field sensing system based on triple resonance and use method

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Embodiment approach

[0019] Such as figure 1 As shown, the triple resonant optical cavity magnetic field sensing system described in this embodiment includes a tunable laser 1, an attenuator 2, a polarization controller 3, an optical fiber taper 4, a magnetic field sensing unit 5, a photodetector 6, a polarization Setter 7, oscilloscope 8, beam splitter 9, electrical spectrum analyzer 10, first network analyzer 11, second network analyzer 12, signal generator 13, DC magnetic field 14, coil 15, yttrium iron garnet spherical cavity 16. Microwave resonant cavity 17, bracket 18, ultraviolet glue 19 and proportional-integral-derivative controller controller 20. The signal generator 13 outputs two-channel signals, the signal of the first channel is sent to the voltage tuning terminal of the tunable laser 1, so that the tunable laser 1 starts to output the frequency-sweeping optical signal; the other channel of the signal of the first channel is sent to the oscilloscope 8 . The signal from the second c...

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Abstract

The invention provides an optical resonant cavity alternating magnetic field sensing system based on triple resonance and a use method. The system comprises a signal generator, a tunable laser, an attenuator, a polarization controller, an optical fiber taper, a magnetic field sensing unit, a photoelectric detector, a bias device, an oscilloscope, a beam splitter, an electrical spectrum analyzer, a first network analyzer, a second network analyzer, a direct-current magnetic field, a coil and a proportional-integral-differential controller. When the mechanical mode and the ferromagnetic resonance mode of a YIG ball are close to the frequency of the alternating magnetic field to be detected and triple resonance is generated, the system can obtain higher magnetic field detection sensitivity. The system has the advantages of low power consumption, electromagnetic interference resistance and the like, and a new device choice can be provided for the field of magnetic field detection.

Description

technical field [0001] The invention relates to an optical resonant cavity alternating magnetic field sensing system based on triple resonance and its use method, in particular to an optical resonant system composed of a yttrium-iron-garnet yttrium-iron-garnet spherical cavity and an optical fiber taper and capable of exciting The magnetic field sensing system constructed by the ferromagnetic resonance microwave resonant cavity in the yttrium iron garnet spherical cavity, the mechanical mode and ferromagnetic resonance mode of the yttrium iron garnet yttrium iron garnet ball in the sensing system and the alternating magnetic field signal When the frequency is close and triple resonance is generated, high magnetic field detection sensitivity can be obtained, which belongs to the field of optics. Background technique [0002] Magnetic field sensors are widely used in digital economy, transportation, life and health, national defense and other fields, and they can be realized i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 于长秋陈志远马世昌周铁军
Owner HANGZHOU DIANZI UNIV
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