1. Efficient Fabrication of Compact Long-Period Gratings Using CO₂-Laser Splicer
- Author
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Jiang, Chen, Wan, Ying, Ma, Yuehui, Chen, Siyu, Sun, Bing, Zhang, Zuxing, Mou, Chengbo, and Liu, Yunqi
- Abstract
We propose to inscribe a compact and reproducible long-period fiber grating (LPFG) in a standard single-mode fiber by a CO2-laser splicer that allows twisting the fiber stepwise during the laser heating process. The operation induced an azimuthal refractive index modulation, enabling the inscribed grating with asymmetric cladding modes coupling. By optimizing the parameters, the grating contrast with more than 30 dB was achieved with a 5.9 mm length. The approach could also fabricate ultra-LPFG, and the gratings with different diffraction orders are inscribed experimentally. The maximum twisting and strain sensitivities of the grating with
${LP}_{1,3}$ $\mu \varepsilon $ - Published
- 2024
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