【作者】 蒋小强；

【导师】 刘德明；

【作者基本信息】 华中科技大学 ， 电子科学与技术， 2005， 博士

【摘要】 色散管理光纤对是新型的色散补偿技术,相对于传统色散补偿技术,由于其更好的色散稳定性,更低的系统成本,且能有效降低系统的非线性效应而近年来在大容量,高速率传输研究领域备受关注。本文对色散管理光纤对的设计原理与工艺优化等进行了系统研究,并采用等离子体化学气相沉积（PCVD）的工艺方法,通过对光纤折射率剖面的设计与精确控制,开发出一种新型色散管理光纤对,并成功进行了40Gbit/s的单信道系统实验。其主要工作和成果如下: （1） 利用有限元分析法研究了W 型和纤芯凹陷型剖面结构非零色散位移光纤的设计原理和传输特性。（2） 成功开发出一种具有超大有效面积的纤芯下陷型色散位移光纤光纤,有效面积大于95μm²,在1550nm 波段的色散值约为9ps/nm²·km, 有效的抑制了传输过程中光非线性效应的产生。通过对光纤结构的优化设计, 使得其在传输波长1550nm 处的传输损耗降到约0.21dB/km,与传统单模光纤的熔接损耗低于0.11dB,且在直径为60mm圆筒上绕100圈后在1460nm到1625nm波长范围所引起的附加弯曲损耗均低于0.02dB。同时,该光纤色散斜率低于0.065ps/nm²·km, 偏振模色散（PMD）小于0.05 ps/（km）^1/2。此外,由于光纤的零色散点移到了1440nm以下,使波分复用（WDM）传输在S波段（1460nm –1530nm）、C 波段（1530nm –1565nm）、L 波段（1565nm –1625nm）上都可以实现。（3） 成功开发出与超大有效面积相对应的反色散光纤,该光纤在保持较好的抗弯曲性能与偏振模色散（PMD）的同时,有效面积达到45μm²,且在1550nm 处的色散为-19.65ps/nm?km, 色散斜率为-0.132ps/nm²·km.此外,通过优化光纤纤芯各层的掺杂原子浓度,在1530nm处光纤的氢损降到了0.01dB/km. （4） 对超大有效面积光纤和对应的反色散光纤构成的色散管理光纤对的各项光学性能等进行了系统的分析研究,并在基于所设计的传输实验方案上,在无需色散补偿模块的前提下,成功地对ULAF+RDF色散管理光纤对进行了40Gb/s的单信道传输320公里更多还原

【Abstract】 Dispersion managed fiber pairs （DMP） is a new type of technoledgy of dispersion compensation. With the advantage of more stable of dispersion compensation, lower system cost, and less sensitivity of nonlineriaty of optical transmission system, it is becoming hot point in the research field of large capacity and high bit-rate transmission system. A new type of dispersion managed fiber pairs is designed and fabricated by plasma chemical vapor deposition （PCVD） process, the design principle and process optimization are also studied in this paper. The transmission with 40Gbit/s is also successfully achieved based on this new kind of dispersion managed pairs. The main content and achievements are as followe. （1） The design principle and transmission properties of non-zero dispersion-shifted fiber with core-depressed and W type of profile are studied by finite-element method. （2） The ultra large effective core area fiber （ULAF） is successfully developed with the effective-core-area of more than 95μm² and the dispersion of 9 ps/nm·km at 1550nm, which can effectively suppress the effect of nonlinearity on the transmission system. Meanwhile, the attenuation at 1550nm is reduced to around 0.21dB/km, and the splice loss with conventional single mode fiber is less than 0.11dB while keeping the good bending performance （ < 0.02dB on the wavelength range from 1460nm to 1625nm with 60mm bending diameter and 100 turns）. The fiber also has a low dispersion slop of less than 0.065ps/nm²·km and a low polarization mode dispersion （PMD） of less than 0.05ps/（km）^1/2 . Furthermore, the fiber can be used on the S-band （1460nm –1530nm）, C-band （1530nm –1565nm） and L-band （1565nm –1625nm） for wavelength division multiplexing （WDM） system because the zero-dispersion wavelength is shifted to lower than 1440nm. （3） Reverse dispersion fiber （RDF） with depressed-core index profile, which consisit of the dispersion managed pairs together with ULAF, is also successfully developed, which has a core-effective-area of 45μm², dispersion of –19.65ps/nm?km and dispersion slop of –0.132ps/nm²·km while maintaining the low bending induced attenuation and low PMD value. Furthermore, the hydrogen induced attenuation at 1530nm is decreased to the value of less than 0.01dB/km by optimized the dopant concentration of deferent core layer. （4） The optical performance of this dispersion managed fiber pairs consisited of ULAF and RDF is researched in this paper. The transmission distance of 320km with 40G/s is achieved successfully without DCF modules. The result shows that this new type of dispersion managed pairs is suitable for large capacity, high bit-rate long-haul wavelength division multiplexing （WDM） transmission system without using dispersion compensation modules.更多还原