title: Magnetic field tunability of optical microfiber taper integrated with ferrofluid.
abstract: 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.
authors: Yinping
authors: Y
authors: Miao
authors: Jixuan
authors: J
authors: Wu
authors: Wei
authors: W
authors: Lin
authors: Kailiang
authors: K
authors: Zhang
authors: Yujie
authors: Y
authors: Yuan
authors: Binbin
authors: B
authors: Song
authors: Hao
authors: H
authors: Zhang
authors: Bo
authors: B
authors: Liu
authors: Jianquan
authors: J
authors: Yao
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D060526:Magnetic Fields; D059346:Magnets; D008904:Miniaturization; D008962:Models, Theoretical; D012542:Scattering, Radiation; D012996:Solutions / Q000737:chemistry*
chemical_list: D012996:Solutions