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 30.31dB with only 22 periods in a 1.0cm long optical fiber and possesses unique characteristics for sensing applications. The bending and strain sensitivities are 1.74nmm and 1.11pm/με, respectively. The polarization dependent loss is large, up to 11.65dB, 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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