Long-period grating fabricated by periodically tapering standard single-mode fiber |
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Authors: | Shao Li-Yang Zhao Jian Dong Xinyong Tam H Y Lu C He Sailing |
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Affiliation: | Center for Optical and Electromagnetic Research, Zhejiang University, Hangzhou, Zhejiang, China. liyangshao@gmail.com |
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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 -30.31 dB with only 22 periods in a 1.0 cm long optical fiber and possesses unique characteristics for sensing applications. The bending and strain sensitivities are 1.74 nm m and 1.11 pm/mu epsilon, respectively. The polarization dependent loss is large, up to 11.65 dB, which is caused by an asymmetric index profile in the cross section of the tapered LPG. |
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