高频CO_2激光脉冲写入长周期光纤光栅的弯曲特性分析  

Bend Characteristics Analysis of Novel LPFGs Written by High-frequency CO_2 Laser Pulses

作　　者：牛永昌[1] 饶云江[1] 胡爱姿[1] 朱涛[1] 

机构地区：[1]重庆大学光电工程学院,重庆400044

出　　处：《光子学报》2005年第6期825-829,共5页Acta Photonica Sinica

基　　金：国家杰出青年科学基金(60025515);教育部科学技术研究重点项目(104210);重庆市自然科学基金重点项目资助

摘　　要：分析了高频CO_2激光脉冲写入的长周期光纤光栅弯曲的谐振波长漂移灵敏度、谐振峰幅值变化的机理,讨论了新型长周期光纤光栅弯曲方向相关性并进行了数值计算,分析结果与实验结果相符.LPFGs written by high-frequency CO2 laser pulses have great potential for use in optical fiber sensing and communication. It is of importance to study the fundamental characteristics of these novel LPFGs. In this paper, a more systematic analysis is carried out to investigate the resonant wavelength-bend sensitivity of the LPFG and its bend loss of resonant peaks based on the mode field theory. It is for the first time to our knowledge, that a method is proposed for analysis of the orientation-dependence of the bend of the LPFG. The simulation is in agreement with experimental results. This paper provides a more systematic analysis for the bend characteristics analysis of the LPFG written by the high-frequency CO2 laser pulses exposure method.

关 键 词：光纤器件 光纤传感器 长周期光纤光栅(LPFG) 弯曲特性 

分 类 号：TN252[电子电信—物理电子学] TN253