文献类型：期刊文献

中文题名：基于三个非对称光纤布拉格光栅的双腔窄带宽双波长透射

英文题名：Ultranarrow Dual-Transmission Properties of a Two-Cavity Structure Based on Three Asymmetric Fiber Bragg Gratings

作者：陈建[1];邓立[1];钮月萍[1];龚尚庆[1]

机构：[1]华东理工大学理学院,上海200237

年份：2020

卷号：47

期号：8

起止页码：205

中文期刊名：中国激光

外文期刊名：Chinese Journal of Lasers

收录：CSTPCD;;EI(收录号：20204709517114);Scopus;WOS:【ESCI(收录号:WOS:000577069300026)】；北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金(11504108,11774089,11974109)。

语种：中文

中文关键词：光纤光学;光纤布拉格光栅;双透射;双腔结构;光纤激光器

外文关键词：fiber optics;fiber Bragg gratings;dual-transmission;two-cavity structure;fiber lasers

摘要：研究了由三个非对称光纤布拉格光栅(FBG)构成的双腔结构的双波长透射特性。三个FBG之间的周期(或布拉格波长)不同,导致它们的禁带部分重叠,形成两个重叠区域。通过调节FBG的周期来控制每个重叠区域的大小,使每个重叠区域只允许一个波长通过,从而实现双波长透射。如果在双透射情况下增加腔长,则透射带宽会被压窄,从而获得超窄带宽。此外,两个透射波长之间的间隔可通过改变FBG的周期而改变。基于该全光纤结构的设计思路,可以将其进一步推广以实现等间隔甚至是不等间隔的多波长透射。该结构在双波长或多波长光纤激光器领域具有潜在应用价值。
In this study,the dual-transmission properties of a two-cavity structure comprising three asymmetric fiber Bragg gratings(FBGs)are investigated.The periods or Bragg wavelengths of the three FBGs are different from each other,causing their three stopbands to partially overlap and resulting in two overlapped regions.The sizes of these overlapped regions can be controlled by tuning the FBG periods.In addition,only one wavelength can be transmitted from each of the overlapped regions.Thus,dual-transmission is achieved.However,dual transmission will exhibit an ultranarrow bandwidth if a long cavity is considered.Further,the spacing between two wavelengths can be altered by adjusting the FBG periods.The all-fiber structure proposed in this study can be extended to achieve multiple transmissions exhibiting equal or unequal spacings.The proposed structure can be potentially applied in dual-or multi-wavelength fiber lasers.