Helical Long-Period Gratings Inscribed in Polarization-Maintaining Fibers by CO2 Laser

被引：50
|
作者：
Jiang, Chen [1 ]
Liu, Yunqi [1 ]
Zhao, Yunhe [1 ]
Mou, Chengbo [1 ]
Wang, Tingyun [1 ]
机构：
[1] Shanghai Univ, Key Lab Specialty Fiber Opt & Opt Access Networks, Joint Int Res Lab Specialty Fiber Opt & Adv Commu, Shanghai Inst Adv Commun & Data Sci, Shanghai 200444, Peoples R China
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2019年 / 37卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Fiber gratings; helical long-period gratings; optical fiber sensors; polarization-maintaining fibers; TEMPERATURE; FABRICATION; WRITTEN;
D O I：
10.1109/JLT.2018.2883376
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We demonstrate the fabrication of helical long-period gratings (HLPGs) in a polarization-maintaining fiber using a CO2 laser. The maximum polarization-dependent loss (PDL) of the grating was measured to be more than 30 dB at the resonance wavelength. The HI.PG was found to have a high refractive index sensitivity of -7248.6 nm/RIU when the surrounding refractive index changes in the range of 1.4470-1.4600, temperature sensitivity of 158.8 pm/degrees C, and strain sensitivity of 3.17 pm/mu epsilon. The twist sensitivities based on intensity variation were measured to be 5.98 dB/(rad/m) (co-directional twist) and -5.97 dB/(rad/m) (contra-directional twist), respectively. The demonstrated grating devices have promising applications as high-sensitivity fiber sensors, PDL compensator, etc.
引用
收藏
页码：889 / 896
页数：8
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