Post-Treatment Techniques for Enhancing Mode-Coupling in Long Period Fiber Gratings Induced by CO2 Laser

• 作者: Xizhen XU Jian TANG Jing ZHAO Kaiming YANG Cailing FU Qiao WANG Shen LIU Changrui LIAO Jiarong LIAN Yiping WANG
• 来源期刊: 光子传感器:英文版
• 学科: 工学
• 关键词: 长周期光纤光栅 后处理技术 光栅增强 模式耦合 激光诱导 二氧化碳 光纤光栅滤波器 LPFG
• 年，卷（期）: 2015,（4）
• 页码范围: 339-344
• 页数: 6页
• 分类号: TN253
• 语种: 中文

摘要

Two promising post-treatment techniques, i.e. applying tensile strain and rising temperature, are demonstrated to enhance the mode-coupling efficiency of the CO2-1aser-induced long period fiber gratings (LPFGs) with periodic grooves. Such two post-treatment techniques can be used to enhance the resonant attenuation of the grating to achieve a LPFG-based filter with an extremely large attenuation and to tailor the transmission spectrum of the CO2-1aser-induced LPFG after grating fabrication.