新型弯曲不敏感光纤中写入的长周期光纤光栅  

Long-Period Fiber Gratings in a New Bend-Insensitive Single-Mode Fiber

作　　者：汪文华[1] 饶云江[1] 龚元[1] 

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,四川成都611731

出　　处：《光学与光电技术》2011年第4期20-22,34,共4页Optics & Optoelectronic Technology

基　　金：重庆理工大学汽车零部件制造及检测技术教育部重点实验室开放基金资助项目

摘　　要：报道了一种用高频CO_2激光器在有纳米环结构的新型弯曲不敏感光纤上写入的长周期光纤光栅。实验表明只有周期在两个特定的范围内的长周期光纤光栅在1 200～1650 nm波长范围内会有明显的谐振峰出现。对两个周期分别为295μm和470μm的长周期光纤光栅的温度和应变特性进行了研究。实验结果显示周期为295μm的长周期光纤光栅的谐振波长对温度和应变变化均敏感,而周期为470μm的长周期光纤光栅的谐振波长只对温度变化敏感。Long-period fiber gratings（LPFGs） written in nano-engineered bend insensitive single-mode fiber were reported. It is found that only when the pitches of the gratings are in two special ranges obvious resonance peaks can be obtained within the band of 1 200-1 650 nm. The temperature and strain sensitivity of the gratings with the pitches of 295 μm and 470 μm were measured. The grating, with a pitch of 295 μm, is sensitive to the change of the temperature and strain, while the grating with a pitch of 470 μm is only sensitive to the change of the temperature.

关 键 词：弯曲不敏感光纤 光纤光栅 CO2激光 光纤传感 

分 类 号：TN253[电子电信—物理电子学]