Abstract

A fiber-optic component is fabricated with etched fiber coated by magnetic fluid (MF) for its evanescent field to be modulated by the MF. The magneto-induced linear dichroism of the MF is investigated under different temperatures with the component. The experimental results show that the MF possesses weak linear dichroism (maximum of 2.37% at 25°C) caused by its sparse magneto-induced chains. Considering the relationships between the linear dichroisms and temperature, there is a transition point of magnetic field at $\sim 4\mathrm{mT}$. Up to $\sim 4\mathrm{mT}$, the linear dichroisms decrease with the temperature; however, for higher magnetic field strengths, the linear dichroisms increase with the temperature. Interestingly, a small initial linear dichroism (up to 0.255% at 5°C) without magnetic field is also observed.

© 2017 Optical Society of America

Ultralong time response of magnetic fluid based on fiber-optic evanescent field

Bobo Du, Dexing Yang, Yang Bai, Yuan Yuan, Jian Xu, Yajun Jiang, and Meirong Wang
Appl. Opt. 55(21) 5585-5590 (2016)

All-fiber magnetic field sensor based on tapered thin-core fiber and magnetic fluid

Junying Zhang, Xueguang Qiao, Hangzhou Yang, Ruohui Wang, Qiangzhou Rong, Kok-Sing Lim, and Harith Ahmad
Appl. Opt. 56(2) 200-204 (2017)

Magnetic field sensor using the fiber loop ring-down technique and an etched fiber coated with magnetic fluid

Tao Shen, Yue Feng, Binchao Sun, and Xinlao Wei
Appl. Opt. 55(4) 673-678 (2016)

Agglomeration response of nanoparticles in magnetic fluid via monitoring of light transmission

Yun Zou, Ziyun Di, and Xianfeng Chen
Appl. Opt. 50(8) 1087-1090 (2011)

Magnetic field sensing based on V-shaped groove filled with magnetic fluids

Hongzhu Ji, Shengli Pu, Xiang Wang, and Guojun Yu
Appl. Opt. 51(8) 1010-1020 (2012)