Abstract
We fabricated an asymmetric long-period grating (LPG) by periodically tapering a section of standard single-mode fiber using a resistive filament heating. The LPG exhibits large peak transmission attenuation of with only 22 periods in a long optical fiber and possesses unique characteristics for sensing applications. The bending and strain sensitivities are and , respectively. The polarization dependent loss is large, up to , which is caused by an asymmetric index profile in the cross section of the tapered LPG.
© 2008 Optical Society of America
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5 May 2017: A correction was made to the title.
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