色散型光纤中的超短脉冲传输特性

Ultrashort Pulse Transmission Characteristics in Dispersive Fiber

基于此技术的高品质超短光脉冲源是下一代超长距离、超大容量光通讯的核心技术。采用色散衰减型光纤对高阶孤立子进行非绝热压缩可以产生皮秒甚至亚皮短秒脉冲,然而该方法所产生的激光通常具有很大的台基依赖性。在高速光通讯中,带底座的脉冲会对邻近的脉冲产生影响。在此基础上,通过对单模光纤进行孤立子成形,不仅可以消除台基效应,还可以对超短激光进行进一步的压缩。作为一种新型的光学器件,具有构造简便、应用范围广等优点,成为当前的一个热门课题。此外,由于具有等效快饱吸收特性,目前已被用于无源锁模技术,特别是在掺饵光纤激光器中。我们将对由色散-衰减型纤维组成的非线性环形反射(DDF-NOLM)实现的超短激光输出特性进行深入的理论和实验研究。

High quality ultrashort optical pulse source based on this technology is the core technology of the next generation of ultra long distance and ultra large capacity Optical communication.Non adiabatic compression of higher-order solitons using dispersion attenuation type fibers can generate picosecond or even sub picosecond pulses,but the laser generated by this method usually has a significant stage dependence.In high-speed Optical communication,the pulse with base will affect the adjacent pulse.On this basis,by performing soliton shaping on single mode fibers,not only can the plateau effect be eliminated,but also further compression of ultra short lasers can be carried out.In addition,due to the equivalent fast saturation absorption,it has been used in passive Mode locking technology,especially in erbium-doped fiber lasers.We will conduct in-depth theoretical and experimental research on the ultra short laser output characteristics achieved by nonlinear ring reflection(DDF NOLM)composed of dispersion attenuation fibers.