光学学报, 2009, 29 (9): 2355, 网络出版: 2009-10-09
光纤光栅法布里-珀罗腔的腔、栅边缘特性分析
Analysis of Edge Characteristics of Grating and Cavity of Fiber Grating-Based Fabry-Pérot Cavity
光纤光学 法布里-珀罗腔 光纤布拉格光栅 模式耦合 fiber optics FabryPérot (FP) cavity fiber Bragg grating (FBG) couplingmode
摘要
把组成光纤光栅法布里-珀罗腔的两个光纤光栅的初相位纳入了讨论范围,用耦合波方程推导了任意初相位下光纤光栅法布里-珀罗腔的透射和反射率的表达式。其中的相位因子包含了由光传播常数调制的腔长、光纤光栅的相位突变、光纤光栅初相位和由光纤光栅空间频率调制的光栅长度等四部分。分析了光纤光栅初相、由光栅空间频率调制的光栅长度两个因子对反射谱的影响,并提出了一种把光纤光栅法布里-珀罗腔等效为理想法布里-珀罗腔的方法。
Abstract
The initial phase of the two fiber Bragg gratings used in FabryPérot cavity was considered and the reflectivity and transmissivity expressions of fiber grating-based FabryPérot cavity at any FBG’s initial phase were derivated by coupledwave equation. The phase factors in the expression include cavity length modulated by propagation constant, phase mutation of the fiber Bragg grating, initial phase of the two fiber Bragg gratings and fiber grating length modulated by space frequency of the fiber Bragg grating. The influence of the latter two factors on reflection spectrum was analyzed, and a method to regard a fiber grating-based Fabrypérot cavity as ideal FabryPérot cavity was presented.
李文博, 周王民, 魏志武, 成振龙, 魏光虎, 史亚龙. 光纤光栅法布里-珀罗腔的腔、栅边缘特性分析[J]. 光学学报, 2009, 29(9): 2355. Li Wenbo, Zhou Wangmin, Wei Zhiwu, Cheng Zhenlong, Wei Guanghu, Shi Yalong. Analysis of Edge Characteristics of Grating and Cavity of Fiber Grating-Based Fabry-Pérot Cavity[J]. Acta Optica Sinica, 2009, 29(9): 2355.