光栅辅助的光纤谐振环反射特性研究  

Reflection Characteristics of Grating-Assisted Fiber Resonator

作　　者：李卫彬[1,2] 孙军强[1] 

机构地区：[1]华中科技大学光电子科学与工程学院,武汉光电国家实验室,湖北武汉430074 [2]河南理工大学物理化学学院,河南焦作454000

出　　处：《光学学报》2009年第6期1467-1470,共4页Acta Optica Sinica

基　　金：国家自然科学基金(60678020)资助项目

摘　　要：针对成品相移光栅反射谱中透射窗口位置的不可调谐性,提出了一种由单模光纤谐振环和普通布拉格光栅组成的新型器件。利用信号流程图的方法,详细分析了该器件的工作原理,给出了该器件的反射输出表达式,并推导了该器件的精细度和半峰全宽的表达式,利用Matlab进行了数值模拟。结果发现光栅辅助的光纤谐振环的反射谱具有相移光栅反射谱的特点,并且该器件反射谱中透射窗口的深度和位置还具有可调谐性。最后,分析了光纤谐振环参数对该器件反射谱的半峰全宽和精细度的影响,为进一步提高该器件作为窄线宽单频光纤激光器选频元件的性能提供了理论依据。The transmission window of reflection spectrum for phase-shift grating products is not tunable. To solve this problem, a device with Bragg grating-assisted single-mode fiber resonator is proposed. Using the signal flow graph method, the mechanism of the device is analyzed in detail. Meanwhile, analytical expressions of reflectivity and its finesse, full width at half maximum （FWHM） are derived. Matlab computation results show that reflection spectrum of the proposed device is similar to that of phase-shift grating. Location and depth of transmission window are tunable in its reflection spectrum. Influences on its finesse and FWHM by the parameters of the fiber resonator are also discussed, which provides the theoretical basis for improving its performance as frequency selection element for a narrow line width of single-frequency fiber laser.

关 键 词：光通信 光栅 信号流程图 光纤谐振环 

分 类 号：TN929.11[电子电信—通信与信息系统]