双层芯色散补偿光子晶体光纤  

Dual-Concentric-Core Photonic Crystal Fiber for Dispersion Compensation

作　　者：苑金辉[1] 桑新柱[1] 余重秀[1] 忻向军[1] 

机构地区：[1]光通信与光电子学教育部重点实验室(北京邮电大学),北京100876

出　　处：《北京邮电大学学报》2010年第5期33-36,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家重点基础研究发展计划项目(2010CB327605;2010CB328300);国家高技术研究发展计划项目(2009AA01Z220);国家自然科学基金项目(60807022);国家教育部博士点基金项目(20070013001)

摘　　要：为了抑制通信系统中脉冲的展宽,根据色散补偿理论,提出了一种由单一石英材料制成的双层芯光子晶体光纤(DCCPCF).该光纤的色散值在1.55μm处可达到-6000ps/(nm·km).理论分析表明,在传输过程中内芯基模和外芯缺陷模以相位匹配波长为临界状态,在内芯与外芯之间相互交替传输,并在匹配波长处因模式发生强烈耦合而引起折射率产生大幅度波动.通过对结构参数d1、d2变化的情况下色散曲线的扰动情况进行分析,可为实际制备工作提供一定的理论指导.To restrain the pulse broadening in the communication system, a new type of dual-concentric- core photonic crystal fiber （DCCPCF） composed of single silica material is put forward based on the theory of dispersion compensation. The dispersion value of fundamental mode can achieve up to - 6 000 ps/ （nm＇km） at 1.55 μm. Analysis indicates that the inner core fundamental and outer core defect mode with phase-matching wavelength （Ap） as a critical state will propagate forward alternatively between the inner and outer core region, and the effective indices intensely appears fluctuations due to modes coupling at phase-matching wavelength. By analyzing the perturbation of dispersion with two structure parameters d1, d2 changing, the instruction for actual fabrication at a certain extent is provided.

关 键 词：双层芯光子晶体光纤 多极法 内芯基模 外芯缺陷模 相位匹配波长 

分 类 号：TN25[电子电信—物理电子学]