Polarization-Insensitive Tunable LPFGs Using Magnet-Induced Microbend Under Torsional Stress

Author

Sakata, Hajime ; Wakamiya, Kouji ; Sasaki, Satoshi

Author_Institution

Dept. of Electr. & Electron. Eng., Shizuoka Univ., Hamamatsu, Japan

Volume

26

Issue

9

fYear

2014

fDate

May1, 1 2014

Firstpage

904

Lastpage

907

Abstract

Polarization-insensitive operation in magnet-induced long-period fiber gratings is presented by circulating the polarization axis in the fiber under a coil spring. The polarization-dependent loss is reduced <;0.4 dB around the resonance wavelength. The loss amplitude is controlled up to 20 dB by positioning a Nd-Fe-B magnet under the fiber. The band-rejection filter response does not deteriorate during the loss-tunable operation in torsion fibers.

Keywords

band-stop filters; boron alloys; diffraction gratings; iron alloys; neodymium alloys; optical fibre filters; optical fibre losses; optical fibre polarisation; torsion; NdFeB; band-rejection filter response; coil spring; loss amplitude; loss-tunable operation; magnet-induced long-period fiber gratings; magnet-induced microbend; polarization axis; polarization-dependent loss; polarization-insensitive operation; polarization-insensitive tunable LPFG; resonance wavelength; torsion fibers; torsional stress; Magnetic resonance; Magnetic separation; Magnetomechanical effects; Optical fiber devices; Optical fiber dispersion; Optical fiber polarization; Springs; Permanent magnet; long-period fiber gratings; microbending; polarization-insensitive;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2309701

Filename

6755533