基于高斯光束耦合模型的FFP性能分析  

Analysis of FFP characteristics based on Gaussian beam coupling model

作　　者：巩宪锋[1] 王长松[1] 陈胜平[2] 李家方[2] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]南开大学物理学院,天津300071

出　　处：《激光技术》2004年第4期359-362,共4页Laser Technology

摘　　要：反衬度、反射率、自由光谱带宽是FFP干涉仪的重要性能指标 ,而FFP腔光波几何衰减因子、端面反射率及腔长 3个参数又是影响这些指标的主要因素。针对以均匀光束耦合模型为基础的FFP几何衰减因子的不足 ,提出了以高斯光束耦合为基础的衰减因子模型 ,得到了与实际值接近的衰减因子公式 ;分析了FFP腔长和两端面反射率对反射谱反衬度及反射率的影响 ;Discrimination,reflectivity and FSW(free spectrum width),which are determined by the geometric attenuation factor of optic field and reflectivity of two ends greatly,are the important factors of FFP(fiber Fabry-Perot).Because of the imprecision of the old attenuation factor,which is based on identical beam model,a new model based on Gaussian beams is provided,and the equation of which is found.Then the influence of cavity length and refrectivity of ends to discrimination and reflectivity of FFP is analysed deeply. Conclusively,a FFP wavelength demodulator is designed for optic fiber grating.

关 键 词：光纤式法布里-珀罗干涉仪 几何衰减因子 反衬度 反射率 

分 类 号：TN253[电子电信—物理电子学] O435[机械工程—光学工程]