Open AccessMagnetic field tunability of optical microfiber taper integrated with ferrofluid
Author(s) -
Yinping Miao,
Jixuan Wu,
Wei Lin,
Kailiang Zhang,
Yujie Yuan,
Binbin Song,
Hao Zeng,
Bo Liu,
Jianquan Yao
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.029914
Subject(s) - microfiber , ferrofluid , materials science , optics , magnetic field , photonics , refractive index , intensity (physics) , optical fiber , wavelength , optical filter , light intensity , optoelectronics , physics , quantum mechanics , composite material
Optical microfiber taper has unique propagation properties, which provides versatile waveguide structure to design the tunable photonic devices. In this paper, the S-tapered microfiber is fabricated by using simple fusion spicing. The spectral characteristics of microfiber taper integrated with ferrofluid under different magnetic-field intensities have been theoretically analyzed and experimentally demonstrated. The spectrum are both found to become highly magnetic-field-dependent. The results indicate the transmission and wavelength of the dips are adjustable by changing magnetic field intensity. The response of this device to the magnetic field intensity exhibits a Langvin function. Moreover, there is a linear relationship between the transmission loss and magnetic field intensity for a magnetic field intensity range of 25 to 200Oe, and the sensitivities as high as 0.13056dB/Oe and 0.056nm/Oe have been achieved, respectively. This suggests a potential application of this device as a tunable all-in-fiber photonic device, such as magneto-optic modulator, filter, and sensing element.