偏振模色散和时延抖动对啁啾光纤光栅色散补偿特性的影响.pdfVIP

第32 卷 第 5 期 中 国 激 光 Vol. 32, No. 5 2005 年5 月 CHIN ESE JOU RNA L OF LA SERS May , 2005 : 0258-7025( 2005) 05-0668-05 偏振模色散和时延抖动对啁啾光纤光栅色散 补偿特性的影响 刘 峰, 叶 青, 周赢武, 李 琳, 瞿荣辉, 方祖捷 ( 中国科学院上海光学精密机械研究所, 上海 20 1800) 对存在偏振模色散( P MD) 和群时延( GD) 抖动的非 想线性啁啾光纤光栅的色散补偿特性进行了研究。实 验测量了啁啾光纤光栅的群时延谱和偏振模色散光谱, 论分析和实验测量表明, 啁啾光纤光栅差分群时延 ( DGD) 抖动与其时延抖动密切相关。通过数值模拟方法, 计算了线性啁啾光纤光栅偏振模色散眼图代价与入射到 啁啾光纤光栅色散补偿器的光信号的偏振方向的关系, 计算结果表明在使用啁啾光纤光栅色散补偿器时应对光信 号的偏振方向进行调整, 以获得最佳补偿效果。另外结合实验数据, 模拟计算并讨论了非 想线性啁啾光纤光栅 群时延抖动和偏振模色散引起的信号的展宽和脉冲形状的劣化。 光通信; 偏振模色散; 色散补偿; 啁啾光纤光栅 O436. 3; T N929. 11 A Influence of Polarization Mode Dispersion and Group Time Delay Ripple on Dispersion Compensation by Chirped Fiber Grating LIU Fen , YE Qin , ZHOU Yin-w u, LI Lin, QU Ron -hui, FAN G Zu-jie ( Shanghai I nstitute of Op tics and F ine Mechanics, The Chinese A cademy of S ciences, S hang hai 20 1800, China) Abstract Influence of polarization mode dispersion ( PMD) and roup time delay ripple of the chirped f iber ratin on dispersion compensation w ere investi ated in t his paper . It is show n experiment ally that ripple of polarization- dependent diff erent ial roup delay ( DGD) has very similar variation behavior with the ripple of roup delay ( GD) in their spectra, t hou h the former amplitude is about 40 times hi her than the lat er. T he minimum period of the ripples was measured to be 0. 024 nm. A simplified theory is proposed to explain t he similarity qualit atively. Simulations show that PM D and DGD ripples brin harmful influence to the dispersion compensation usin the