飞秒激光刻写高阶倾斜光纤Bragg光栅  

High-Order Tilted Fiber Bragg Gratings Carved with Femtosecond Laser

作　　者：陈超[1] 杨先辉 王闯 于永森(指导)[1] 

机构地区：[1]集成光电子学国家重点联合实验室,吉林大学电子科学与工程学院,吉林长春130012 [2]中国石油集团渤海钻探工程有限公司博士后科研工作站,天津300457 [3]空军第62团,黑龙江齐齐哈尔161000

出　　处：《光学学报》2014年第5期19-24,共6页Acta Optica Sinica

基　　金：国家自然科学基金(91123027);中国石油集团科研与技术开发项目(2013E-38-06);天津市企业博士后创新项目择优资助(2012-04)

摘　　要：报道了一种利用飞秒激光微纳加工技术在非敏化单模光纤中制备的高阶倾斜光纤Bragg光栅（HO—TFBG）。倾斜折射率调制是将聚焦的飞秒激光穿过高阶相位掩模板，并扫描曝光倾斜放置的光纤实现的，其覆盖了全部纤芯和部分包层。该单-HO—TFBG在1200～1700 nm波长范围内可形成三组与高阶Bragg谐振相对应的“包层模式谐振系列”。因此，其携带的信息量远高于紫外倾斜光纤Bragg光栅（uV—TFBG），其功能性更佳，尤其适用于多传感参数的监控。研究了HO—TFBG的折射率、轴向应变和温度等传感特性。此外，该器件兼具飞秒激光诱导光栅结构的高温稳定性，其在苛刻环境中的化学和物理传感具有潜力。High-order tilted fiber Bragg gratings （HO-TFBG） in non-photosensitized single mode fiber aredemonstrated with femtosecond laser micro-nano machining technique. To realize the tilted refractive indexmodulation in fiber core and partial cladding, a high order phase mask is used to generate periodic light intensitywhich is focused on to the tilted fiber with a lateral scanning. Using this method, three groups of cladding moderesonances in relation with high order Bragg resonance are detected in the wavelength range from 1200 nm to1700 nm. Thus it carries more informations compared with ultraviolet tilted fiber Bragg gratings （UV-TFBG）,especially in multi-parameters monitoring. The refractive index, axial strain and temperature sensing characteristics ofthe HO-TFBG are also studied. Besides, due to the femtosecond laser material modification, this device shows a good abilityin high temperature stability, which has potention in chemical and physical sensing in harsh circumstances.

关 键 词：光纤光学 倾斜光纤Bragg光栅 飞秒激光 相位掩模法 光纤传感 

分 类 号：TN253[电子电信—物理电子学]