High speed optical sampling covering C band and L band using CPPLN waveguide

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• 作者：Ning Chunmei ; ^{mavlous218@yahoo.com.cn} ; Yang Aiying ; Cui Jianmin ; Shen Shikui ; Wu Xiangyu ; Sun Yunan
• 关键词：Optical sampling ; C band and L band ; CPPLN waveguide ; SFG
• 刊名：Optics Communications
• 出版年：2011
• 出版时间：1 March 2011
• 年：2011
• 卷：284
• 期：5
• 页码：1412-1417
• 全文大小：1205 K

文摘

Two means of high speed optical sampling covering C band and L band based on sum frequency generation (SFG) in chirped periodically poled LiNbO₃(CPPLN) waveguide are studied in this paper. For the first method, arbitrary waveband inside C and L band can be sampled by tuning pump wavelength and the bandwidth is controllable by choosing suitable waveguide length and chirped coefficient of CPPLN waveguide. For another, the broad bandwidth covering C band and L band can be obtained with a fixed pump. The numerical simulations based on coupled-wave equations are carried out. The NRZ sequences of 10 Gb/s and 640 Gb/s transmission rate are sampled in simulation. Distinct eye diagrams and quality factors (Q) are obtained by software-synchronized algorithm. The results show that the two means of the optical sampling both can cover C band and L band. SFG in CPPLN waveguide used for optical sampling system has a broad bandwidth and more flexible selectivity.