Microfiber magnetic field sensor with enhanced sensitivity and resolution

Ming Deng; Sanfeng Gu; Danqi Feng

doi:10.1117/12.2620697

26 July 2022 Microfiber magnetic field sensor with enhanced sensitivity and resolution

Ming Deng, Sanfeng Gu, Danqi Feng

Proceedings Volume 12279, 2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 1227903 (2022) https://doi.org/10.1117/12.2620697
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

Magnetic field as a kind of objective substance contains abundant physical information, so high sensitivity and resolution measurement for the magnetic field has great significance in scientific and industrial fields. In this work, we verify a highly sensitive cascaded Mach-Zehnder interferometer (C-MZI) sensor based on optical Vernier effect for the magnetic field measurement, which is composed of a reference MZI (R-MZI) without magnetic fluids (MFs) connected in series with a sensing MZI (S-MZI) with MFs. An evident envelope and shift induced by the external magnetic field is observed in the transmission spectra of the C-MZI, resulting in the sensitivity being elevated by an amplification factor. The experimental results reveal a wavelength sensitivity of -5.148 nm/mT in the range of 10.15~30.44 mT, being ~4.77 of that in the single S-MZI. In order to further improve the detection resolution of the magnetic field, a magnetic field measurement system based on the combination of the above S-MZI and an optoelectronic oscillator (OEO) is proposed, and the spectral response is tested in a small magnetic field range of 1.45~1.90 mT, obtaining a spectral sensitivity of 3.18 kHz/mT, which proves the detection of less than 1 Oe. The designed sensor and system possess the merits of high sensitivity, high resolution, simple fabrication, fast response and low phase noise, having broad prospects in the fields of magnetic field measurement.

Citation Download Citation

Ming Deng, Sanfeng Gu, and Danqi Feng "Microfiber magnetic field sensor with enhanced sensitivity and resolution", Proc. SPIE 12279, 2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 1227903 (26 July 2022); https://doi.org/10.1117/12.2620697

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Magnetism

Magnetic sensors

Sensors

Microwave radiation

Dispersion

Fiber optics sensors

Optoelectronics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years