CN108957366B - Direct-current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic - Google Patents
Direct-current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic Download PDFInfo
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- CN108957366B CN108957366B CN201810631136.0A CN201810631136A CN108957366B CN 108957366 B CN108957366 B CN 108957366B CN 201810631136 A CN201810631136 A CN 201810631136A CN 108957366 B CN108957366 B CN 108957366B
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Abstract
The invention provides a direct-current magnetic field sensing system based on a microbubble cavity mechanical mode tunable characteristic. And voltage signals output by the photoelectric detector are sent to the input end of the spectrometer. The direct-current magnetic field sensing system based on the tunable characteristic of the bottle-shaped microcavity mechanical mode solves the problem that the existing optical resonant cavity is low in precision when demodulating a direct-current magnetic field by using an optical mode, and can obtain higher precision by demodulating direct-current magnetic field information through the change of cavity mechanical mode frequency. The invention is mainly applied to high-precision direct-current magnetic field measurement.
Description
Technical Field
The invention relates to a direct-current magnetic field sensing system based on a microbubble cavity mechanical mode tunable characteristic, in particular to an optical sensing system for demodulating external magnetic field information by using a microbubble cavity mechanical mode, and belongs to the field of optics.
Background
The magnetic field sensor has the advantage of nondestructive detection and is widely applied to a plurality of fields such as traffic, medical treatment, national defense and the like. The direct-current magnetic field sensor is a core device of a plurality of sensors such as current sensors and angle sensors, the sensitivity of the magnetic field sensor determines the detection capability of the current sensor on weak current or the angle resolution capability of the angle sensor, and the high-sensitivity magnetic field sensor can provide more technical choices for the sensors such as current sensors and angle sensors with high resolution. The magnetic field sensor based on the optical resonant cavity has the natural advantages of easiness in integration, low power consumption, high sensitivity, electromagnetic interference resistance and the like, and provides a technical means for high-precision magnetic field sensing. At present, most of direct current magnetic field sensing performed by an optical means is performed based on the tuning characteristic of an optical mode of a resonant cavity, and under the action of a magnetic field, the optical resonant frequency of the cavity changes, so that magnetic field information is demodulated. In order to meet the requirement of high-precision magnetic field sensing, a direct-current magnetic field sensing system based on the mechanical mode tunable characteristic of a micro-bubble cavity is provided, and when the structure is used for magnetic field sensing, the sensitivity is greatly improved compared with that of a direct-current magnetic field sensor based on the optical mode tunable characteristic of an optical resonant cavity, and weak direct-current magnetic field changes can be distinguished.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a direct-current magnetic field sensing system based on the mechanical mode tunable characteristic of a microbubble cavity, which can be used for high-precision direct-current magnetic field sensing.
The invention relates to a direct-current magnetic field sensing system based on a microbubble cavity mechanical mode tunable characteristic, which comprises a signal generator, a tunable laser, an isolator, an attenuator, a polarization controller, an optical fiber cone, a microbubble cavity, a magnetostrictive medium, glue, a photoelectric detector and a spectrometer, wherein the signal generator is connected with the signal generator; the voltage signal output by the signal generator is sent to a voltage tuning port of the tunable laser, the emergent end of the tunable laser is connected with the input end of an isolator, the output end of the isolator is connected with the input end of an attenuator, and a polarization controller is arranged on an optical fiber between the output end of the attenuator and the input end of an optical fiber cone; the optical field output by the optical fiber cone enters the micro-bubble cavity in an evanescent wave coupling mode, the optical field in the cavity is coupled and output to the receiving end of the photoelectric detector through the optical fiber cone, and the signal output by the photoelectric detector enters a spectrometer; the tunable laser, the isolator, the attenuator, the polarization controller, the optical fiber cone and the photoelectric detector in the sensing system are connected by adopting optical fibers; the signal generator is connected with a voltage tuning port of the tunable laser, and the photoelectric detector is connected with the spectrometer by using an electrical cable with two general ports; two ends of the micro-bubble cavity are bonded on the magnetostrictive medium through glue; the micro-bubble cavity and the optical fiber cone are always in a coupling state.
Preferably, the material of the microbubble cavity is silicon dioxide.
Preferably, the wall thickness of the microbubble cavity ensures that evanescent waves exist at the outer surface of the resonant cavity when light is transmitted in the microbubble cavity.
Preferably, the magnetostrictive medium is Terfenol-D or other medium which can deform under the action of a magnetic field, and the mechanical mode of the micro-bubble cavity is ensured to change.
Preferably, the tuning range of the tunable laser is required to meet the detection requirement, and the wave band is selected from a communication wave band and matched with the receiving wave band of the photoelectric detector.
Preferably, the polarization state of the polarization controller is such that the optical quality factor of the cavity modes is highest, so that more light is localized in the cavity.
Preferably, the resolution of the spectrometer is chosen to ensure that the mechanical modes of the chamber are resolved.
Compared with a magnetic field sensing system utilizing the frequency change of the optical mode of the resonant cavity, the sensing system has higher sensitivity under the same condition. Meanwhile, the coupling system of the optical fiber and the micro-bubble cavity is small in size and easy to integrate.
Drawings
Fig. 1 is a schematic structural diagram of an inventive direct-current magnetic field sensing system based on a microbubble cavity mechanical mode tunable characteristic.
Detailed Description
The essential features and the remarkable advantages of the present invention will be further clarified by the following embodiments, but the contents of the present invention are not limited to the following embodiments:
the first embodiment is as follows: as shown in fig. 1, the direct-current magnetic field sensing system based on the microbubble cavity mechanical mode tunable characteristic according to this embodiment includes a signal generator 1, a tunable laser 2, an isolator 3, an attenuator 4, a polarization controller 5, a fiber taper 6, a microbubble cavity 7, a magnetostrictive medium 8, glue 9, a photodetector 10, and a spectrometer 11. The voltage signal output by the signal generator 1 is sent to a voltage tuning port of the tunable laser 2, the emergent end of the tunable laser 2 is connected with the input end of the isolator 3, the output end of the isolator 3 is connected with the input end of the attenuator 4, and the optical fiber between the output end of the attenuator 4 and the input end of the optical fiber cone 6 is provided with the polarization controller 5. The optical field output by the optical fiber cone 6 enters the micro-bubble cavity 7 in an evanescent wave coupling mode, the optical field in the cavity can also be coupled and output to the receiving end of the photoelectric detector 10 through the optical fiber cone 6, and the signal output by the photoelectric detector 10 enters a spectrometer 11. The tunable laser 2, the isolator 3, the attenuator 4, the polarization controller 5, the optical fiber cone 6 and the photoelectric detector 10 in the sensing system are connected by optical fibers; the signal generator 1 and the voltage tuning port of the tunable laser 2, and the photodetector 10 and the spectrometer 11 are connected by using an electrical cable with two ports in common. The change of the external magnetic field causes the magnetostrictive medium 8 to deform, and further causes the mechanical mode of the microbubble cavity 7 bonded on the magnetostrictive medium 8 by the glue 9 to change, so that the frequency spectrum of the transmission field of the cavity measured on the spectrometer 11 contains magnetic field information, and the external direct-current magnetic field information can be demodulated through data processing. In addition, the spectrometer 11 may be replaced by a data acquisition card and data processing software.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1, and the present embodiment is a further limitation of the dc magnetic field sensing system based on the microbubble cavity mechanical mode tunable characteristic described in the first embodiment. The two ends of the micro-bubble cavity 7 are placed on the magnetostrictive medium 8 through the three-dimensional adjusting frame, and the contact position of the two is fixed by using glue 9 on the premise of ensuring that the middle part of the cavity 7 is not in contact with the magnetostrictive medium 8. The optical field is then coupled into the microbubble cavity 7 by means of the fiber taper 6. The micro-bubble cavity 7 can be replaced by a columnar micro-cavity or a micro-cavity with other shapes, so long as the frequency of a mechanical mode is ensured to be changed when the magnetostrictive medium deforms, an optical field output by the light source can be transmitted with low loss in the micro-bubble cavity, and meanwhile evanescent waves exist on the outer surface of the cavity. The shape of the magnetostrictive medium 8 can be freely designed according to requirements, as long as deformation can be ensured under the action of a magnetic field, and the frequency of the mechanical mode of the resonant cavity is changed. When measuring the magnetic field, the system is placed in the environment to be measured, and is adjusted to the optimal magnetic field response position, and the change of the magnetic field in the environment to be measured can be demodulated through the frequency drift of the mechanical mode detected by the spectrometer 11.
Claims (7)
1. A direct-current magnetic field sensing system based on a microbubble cavity mechanical mode tunable characteristic comprises a signal generator (1), a tunable laser (2), an isolator (3), an attenuator (4), a polarization controller (5), an optical fiber cone (6), a microbubble cavity (7), a magnetostrictive medium (8), glue (9), a photoelectric detector (10) and a spectrometer (11); the polarization control device is characterized in that a voltage signal output by a signal generator (1) is sent to a voltage tuning port of a tunable laser (2), the emergent end of the tunable laser (2) is connected with the input end of an isolator (3), the output end of the isolator (3) is connected with the input end of an attenuator (4), and a polarization controller (5) is arranged on an optical fiber between the output end of the attenuator (4) and the input end of an optical fiber cone (6); the optical field output by the optical fiber cone (6) enters the micro-bubble cavity (7) in an evanescent wave coupling mode, the optical field in the cavity is coupled and output to the receiving end of the photoelectric detector (10) through the optical fiber cone (6), and the signal output by the photoelectric detector (10) enters a spectrometer (11); the tunable laser (2), the isolator (3), the attenuator (4), the polarization controller (5), the optical fiber cone (6) and the photoelectric detector (10) in the sensing system are connected by optical fibers; the signal generator (1) is connected with a voltage tuning port of the tunable laser (2), and the photoelectric detector (10) is connected with the spectrometer (11) by using an electrical cable with two universal ports; two ends of the micro-bubble cavity (7) are bonded on the magnetostrictive medium (8) through glue (9); the micro-bubble cavity and the optical fiber cone are always in a coupling state; the change of an external magnetic field causes the magnetostrictive medium (8) to deform, and further causes the mechanical mode of the micro-bubble cavity (7) bonded on the magnetostrictive medium (8) by the glue (9) to change, so that the frequency spectrum of the transmission field of the cavity measured on the spectrometer (11) contains magnetic field information, and the external direct-current magnetic field information can be demodulated through data processing.
2. The direct current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic of claim 1, characterized in that: the material of the micro bubble cavity is silicon dioxide.
3. The direct current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic of claim 1, characterized in that: the wall thickness of the micro-bubble cavity ensures that evanescent waves exist on the outer surface of the resonant cavity when light is transmitted in the micro-bubble cavity.
4. The direct current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic of claim 1, characterized in that: the magnetostrictive medium is Terfenol-D or other medium which can deform under the action of a magnetic field, and the mechanical mode of the micro-bubble cavity is guaranteed to change.
5. The direct current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic of claim 1, characterized in that: the tuning range of the tunable laser meets the detection requirement, and the wave band is a communication wave band matched with the receiving wave band of the photoelectric detector.
6. The direct current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic of claim 1, characterized in that: the polarization state of the polarization controller ensures that the optical quality factor of the cavity mode is highest, so that more light is localized in the cavity.
7. The direct current magnetic field sensing system based on microbubble cavity mechanical mode tunable characteristic of claim 1, characterized in that: the resolution of the spectrometer is chosen to ensure that the mechanical mode of the chamber is resolved.
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| CN110471008B (en) * | 2019-08-08 | 2021-12-07 | 天津大学 | Vector optical fiber magnetic field sensor based on eccentric hollow microsphere cavity and manufacturing method thereof |
| CN111273204B (en) * | 2020-02-25 | 2022-10-25 | 杭州电子科技大学 | Resonant cavity magnetic field sensing system for enhancing DC field sensing precision by wide temperature range AC field |
| CN111580024A (en) * | 2020-04-30 | 2020-08-25 | 杭州电子科技大学 | Optical resonance type magnetic field sensor with high sensitivity area having wide frequency band |
| CN115792750B (en) * | 2023-02-09 | 2023-04-11 | 中北大学 | Magnetic sensing device based on-chip integrated resonant cavity and measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093136A (en) * | 2015-09-22 | 2015-11-25 | 电子科技大学 | All-fiber weak magnetic field measuring device |
| CN107015173A (en) * | 2017-05-25 | 2017-08-04 | 杭州电子科技大学 | A kind of enhanced Whispering-gallery-mode optical resonator magnetic field sensing system |
| CN107014522A (en) * | 2017-05-25 | 2017-08-04 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator temperature-sensing system |
| CN107238745A (en) * | 2017-05-25 | 2017-10-10 | 杭州电子科技大学 | The alternating current sensor-based system of high sensitivity column Whispering-gallery-mode optical resonator |
| CN107255742A (en) * | 2017-05-25 | 2017-10-17 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator alternating voltage sensor-based system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI407653B (en) * | 2010-12-30 | 2013-09-01 | Univ Nat Taiwan Science Tech | Fiber ring laser system and the operation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093136A (en) * | 2015-09-22 | 2015-11-25 | 电子科技大学 | All-fiber weak magnetic field measuring device |
| CN107015173A (en) * | 2017-05-25 | 2017-08-04 | 杭州电子科技大学 | A kind of enhanced Whispering-gallery-mode optical resonator magnetic field sensing system |
| CN107014522A (en) * | 2017-05-25 | 2017-08-04 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator temperature-sensing system |
| CN107238745A (en) * | 2017-05-25 | 2017-10-10 | 杭州电子科技大学 | The alternating current sensor-based system of high sensitivity column Whispering-gallery-mode optical resonator |
| CN107255742A (en) * | 2017-05-25 | 2017-10-17 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator alternating voltage sensor-based system |
Non-Patent Citations (1)
| Title |
|---|
| 光纤气泡微腔传感及回音壁模式调控技术;刘申;《中国博士学位论文全文数据库 信息科技辑》;20170815(第08期);138、139、155 * |
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