多波长掺铒光纤激光器的研究进展

Research Progress of Multi-Wavelength Erbium-Doped Fiber Lasers

多波长掺铒光纤激光器(MW-EDFL)在密集波分复用(DWDM)系统中具有重要作用,是近年来光纤通信领域的研究热点。回顾了多波长掺铒光纤激光器的发展历史,介绍了多波长掺铒光纤激光器的工作原理,包括其抑制模式竞争、实现多波长输出的方式,着重介绍了多种梳状滤波器的原理,包括Lyot滤波器、Sagnac干涉环、MachZehnder干涉仪。综述了近年来实现多波长掺铒光纤激光器的研究成果,分析了各个实现方案的优劣特性,并对其应用和发展前景进行了展望。

Multi-wavelength erbium-doped fiber lasers （MW-EDFL）, which play an important role in dense wavelength division multiplexing （DWDM）, have been the focus of optical communications in recent years. The history of MW-EDFL is reviewed briefly. The operating principle of MW-EDFL is reviewed, including the suppression of mode competition to obtain the multi-wavelength output. The principle of comb filters, including the Lyot filter, Sagnac interference loop and Mach-Zehnder interferometer, is discussed in detail. The recent research achievements of MW-EDFL are introduced and their pros and cons are analyzed. Moreover, their promising future is presented.