【作者】 林海峰；

【导师】 邱怡申；

【作者基本信息】 福建师范大学 ， 光学， 2003， 硕士

【摘要】 密集波分复用(DWDM)系统是光纤通信网中容量拓展的关键技术，能够同时产生多波长的光纤激光器在此系统中显示出十分诱人的应用前景，已成为人们广泛研究的课题。本文在深入调研国内外多波长激光器的研究现状及发展趋势的基础上，明确了研究多波长掺铒光纤激光器的意义，提出了一种新颖的常温下实现多波长同时激射掺铒光纤环形激光器。 本文首先从速率方程理论出发，利用解析的方法推导出掺铒光纤激光器输出特性参数与掺铒光纤和耦合器参数之间的定量关系，(如，激光输出功率、波长与掺铒光纤的长度、掺杂浓度、耦合器耦合比及腔的损耗等参数之间的关系)；并从实验上加以分析讨论，实验结论与理论值相吻合；利用改变耦合器的耦合比获得了几个nm的波长调谐。进一步，我们设计了一种新颖的多波长掺铒光纤环形激光器，这种激光器是利用Mach-Zenhder(M-Z)光纤型干涉仪作为梳状滤波器，并且与复合腔共同选频，获得了窄线宽、等间隔的多波长同时输出，这种激光器具有在常温工作，结构简单，成本低等优点。最后分析了该研究方案存在的一些问题以及有待改进的方案。更多还原

【Abstract】 Dense-wavelength division multiplexing(DWDM) is one of the key technologies for capacity expansion in optical fiber network systems. The multi-wavelength fiber laser has shown the attractive potential application and it has been the subject of intensive study. On the basis of the deep study of the current studying situation of multi-wavelength fiber lasers and its tendency of development, we make clear the significance of the study of multi-wavelength fiber lasers and propose a novel multi-wavelength Erbium-doped fiber ring laser at room temperature.In this thesis, firstly, with the rate equation theory, we use analytical methods to deduce the relationships of the lasing wavelength and output power vs Erbium-doped fiber length, coupler ratio and intracavity losses. The experimental results show a good agreement with the calculated values. Furthermore, several nanometer tunable lasing wavelength is obtained by varying coupler ratio. Secondly, we propose and demonstrate experimentally a novel multi-wavelength Erbium-doped fiber ring laser by using a Mach-Zehnder fiber interferometer and composite cavity. As a result, simultaneous multi-wavelength oscillations with narrow linewidth and equal wavelength span are obtained in room temperature. This device has advantageous of simple design fabrication and low cost et al. Finally, some problems in the study are analyzed and discussed.更多还原