摘要
提出了一种利用非线性二次曝光技术制作三角形光纤Bragg光栅的新方法.该方法只使用普通Bragg位相模板,采用两次曝光技术,通过控制光纤光栅的本地谐振波长和反射率,达到控制光纤光栅谱形的目的.第一次直接对光纤曝光,用来控制光纤光栅谐振波长;第二次通过位相模板曝光,用来控制光纤光栅的反射率.考虑到光敏光纤感光特性曲线的多项e负指数变化规律,按照“分步写入光纤光栅设计软件”进行曝光分布设计,利用“分步曝光光纤光栅写入系统”进行曝光控制,使用信息产业部第46研究所生产的DCS01型光敏光纤,得到了线性范围1.24nm、反射率为0～64%的三角形光纤Bragg光栅.三角形光纤Bragg光栅作为光纤光栅传感解调器件,在光纤传感领域具有重要应用价值.
In this paper, a novel nonlinear double-exposure technique for fabricating fiber Bragg gratings with triangular spectrum is proposed. The spectrum of fiber Bragg grating can be controlled by double exposure technique. The first exposure is used to control the resonant wavelength of fiber grating by directly irradiating the naked photosensitive fiber. The second one is to form the grating to control its reflectivity through an ordinary Bragg phase mask. Considering the multi-decaying-exponential relationship between photo-induced index increment of photosensitive fiber and its irradiating dose, nonlinear doubleexposure profiles are calculated by our self-designed software. The triangular fiber Bragg grating is obtained with DCS-01 photosensitive fiber by using a scanning system. As a result, the bottom width and the reflectivity of the grating is 1.24 nm and 0～ 64 %, respectively. As a demodulation device, a triangular fiber Bragg gratings is very important in a fiber grating sensing system.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第7期993-995,共3页
Acta Photonica Sinica
基金
国家863高科技攻关基金(2002AA3110)
武汉理工大学博士启动基金资助项目
