双波长啁啾相移光纤光栅  

A Phase-shifted Chirped Fiber Bragg Grating with Dual-wavelength Transmission

作　　者：陈金林[1,2] 孙军强[1,2] 夏利[3] 刘爽[1,2] 

机构地区：[1]华中科技大学武汉光电国家实验室(筹) [2]华中科技大学光电子科学与工程学院,武汉430074 [3]南洋理工大学电气电子工程学院,新加坡639798

出　　处：《光子学报》2009年第7期1776-1779,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(60678020)资助

摘　　要：理论研究并实验验证了一种含有两段π相移的啁啾相移光纤光栅.采用F矩阵对啁啾相移光纤光栅进行计算并分析了该光栅的谱特性.含有两段π相移的啁啾相移光纤光栅可以在普通啁啾光栅透射谱阻带中产生双波长透射峰,透射峰位置直接取决于光栅中π相移的位置,透射峰的线宽和透射峰的波长间隔没有关系,仅随着啁啾率的增大而增大.采用带相位掩模的逐点扫描法对含有两段π相移的双波长啁啾相移光栅进行了制作,获得波长间隔为8nm的双波长透射谱的光栅器件.该光栅的消光比和3dB谱线宽分别为20dB和0.08nm,实验结果和理论设计一致.A phase-shifted chirped fiber Bragg grating with two π phase shifts was studied theoretically and experimentally. The grating was calculated by F matrix,based on which the properties of the spectra were analyzed. The phase-shifted chirped fiber Bragg grating has a transmission spectrum with dual-waveleng.th peaks. The wavelength position of the peaks is directly dependent on the position of the π phase shifts. The linewidth of the peaks increases only with the chirp of the grating,and is not related with the wavelength difference of the two peaks. Due to the local character of chirped fiber gratings, the design of the phase- shifted chirped fiber Bragg gratings is simple. A phase-shifted chirped fiber Bragg grating with two n phase shifts was fabricated by ultraviolet scanning with a phase mask. The wavelength difference, the extinction ratio,and the 3dB linewidth of the two peaks in the transmission spectrum are 8nm, 20dB and 0.08nm, respectively,which agree with the theoretical design.

关 键 词：光纤器件 光纤光栅 啁啾相移光纤光栅 双波长 π相移 

分 类 号：TN253[电子电信—物理电子学]