Presentation 2014-11-13
Polarization-insensitive operation of microbend-induced LPFGs based on optical activity in squeezed fibers
Hajime SAKATA, Satoshi SASAKI, Kouji WAKAMIYA, Tomohiro HARADA,
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Abstract(in English) Microbend-induced long period fiber gratings are loss- and wavelength-tunable and can be reconfigured. However, they have inherent polarization dependence due to coupling with asymmetric cladding modes under mechanical pressure. By analyzing the state of polarization, the rotation efficiency of the polarization principal axis due to the torsional fiber is changed by the stress, and the polarization ellipticity is changed simultaneously. We report that the polarization dependence can be reduced by twisting the fiber for inducing the microbend. The loss amplitude at the resonance wavelength is controlled by the combination of a coil spring and a neodymium magnet.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Long-period gratings / Permanent magnet / Polarization-insensitive
Paper # OFT2014-37
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Committee OFT
Conference Date 2014/11/6(1days)
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Registration To Optical Fiber Technology (OFT)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Polarization-insensitive operation of microbend-induced LPFGs based on optical activity in squeezed fibers
Sub Title (in English)
Keyword(1) Long-period gratings
Keyword(2) Permanent magnet
Keyword(3) Polarization-insensitive
1st Author's Name Hajime SAKATA
1st Author's Affiliation Graduate School of Engineering, Shizuoka University()
2nd Author's Name Satoshi SASAKI
2nd Author's Affiliation Graduate School of Engineering, Shizuoka University
3rd Author's Name Kouji WAKAMIYA
3rd Author's Affiliation Graduate School of Engineering, Shizuoka University
4th Author's Name Tomohiro HARADA
4th Author's Affiliation Graduate School of Engineering, Shizuoka University
Date 2014-11-13
Paper # OFT2014-37
Volume (vol) vol.114
Number (no) 301
Page pp.pp.-
#Pages 4
Date of Issue