Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sagnac magnetic field sensor with microstructure fiber

A technology of micro-structured optical fiber and magnetic field sensor, which is applied in the use of magneto-optical equipment to measure the magnetic field, the magnitude/direction of the magnetic field, etc., and can solve the problems of high transmission loss of magnetic fluids.

Inactive Publication Date: 2018-12-25
YANSHAN UNIV
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high transmission loss of ferrofluid, the thickness of ferrofluid film is often only tens of microns

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sagnac magnetic field sensor with microstructure fiber
  • Sagnac magnetic field sensor with microstructure fiber
  • Sagnac magnetic field sensor with microstructure fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0025] Such as figure 1 Shown, a kind of Sagnac magnetic field sensor with microstructure optical fiber of the present invention comprises: broadband light source BBS, 3dB coupler, polarization controller PC, microstructure optical fiber PCF, electromagnet and its power supply and spectrometer OSA, wherein said broadband The light source BBS outputs laser light to the 3dB coupler, and the 3dB coupler divides the laser light output by the broadband light source BBS into two beams of linearly polarized light propagating clockwise and counterclockwise,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a sagnac magnetic field sensor with a microstructure fiber, comprising: a broadband light source BBS, a 3dB coupler, a polarization controller PC, a microstructure fiber PCF, an electromagnet and a power supply thereof, and a spectrometer OSA. The broadband light source BBS outputs a laser to the 3dB coupler; the 3dB coupler divides the laser output from the broadband source BBS into two linearly polarized lights propagating in a clockwise direction and a counterclockwise direction. The polarization controller PC rotates the polarization directions of the two linearly polarized lights by 90 degrees. The microstructure fiber PCF is provided with electromagnets powered by a power source on both sides. The magnetic field generated by the electromagnet make the magneticmoment of the magnetic particles in the magnetic fluid orient the direction of the magnetic field, so that two beams of light propagating in a clockwise and counterclockwise direction are interfere at the output end of the 3dB coupler. Spectrometer OSA measures the interference spectrum of the 3dB coupler output. The sagnac magnetic field sensor with microstructure fiber obtains the strength anddirection of the magnetic field by measuring the wavelength of the wave of the interference spectrum.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a Sagnac magnetic field sensor with a microstructure optical fiber, which is used for measuring magnetic field strength and magnetic field direction. Background technique [0002] Magnetic fluid is a monodomain colloidal solution in which nanoscale magnetic particles wrapped in surfactants are uniformly dispersed in a liquid solvent. Commonly used magnetic particles include Fe 3 o 4 , Fe 2 o 3 , Ni, Co and their alloys, etc. The solvents mainly include water, kerosene, heptane, etc. The refractive index of ferrofluid mainly depends on magnetic particles and solvent, and has a linear relationship with the concentration of magnetic particles. When the direction of the magnetic field passing through the magnetic fluid is parallel to the direction of the incident light, the refractive index of the magnetic fluid increases with the increase of the magnetic field, w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 陈海良马明建李曙光井西利李建设
Owner YANSHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com