Research on intermode-beating mode-locked cascaded Raman fiber lasers

摘要 光纤激光器因具有易集成化、光束质量好、输出波长可调谐及高转化效率等众多优点，受到广泛研究。与传统稀土掺杂光纤激光器相比，拉曼光纤激光器具有以下特点：1）只要给定恰当的拉曼泵浦源和拉曼增益介质，便能够获得任意波长的激射；2）运用级联拉曼增益，能将激光输出波长扩展到更广泛的新波段。为了获得脉冲激光，常常需要用到调Q或锁模技术。调Q可以获得大的单脉冲能量，而要想获得超短脉冲通常需要用到锁模机制。常用锁模技术需要的外在条件比较多，主动锁模需要在腔内插入调制器或电光晶体等。而被动锁模常常需要借助于可饱和吸收体，且锁模波长主要受限于光纤中的掺杂介质。因此，人们一直在探索自锁模的机制，即无需专门的锁...Abstract Fiber lasers have been widely studied because of its easy integration, good beam quality, tunable output wavelength, high efficiency and so on. Compared with those conventional rare-earth-doped fiber lasers, Raman fiber lasers have the following characteristics: 1) only if the appropriate Raman pump sources and the Raman gain medium are given, it can emit any wavelength lasing, 2) using ...学位：工学硕士院系专业：信息科学与技术学院_光学工程学号：2312012115289