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光纤激光器以高光束质量、高效率、高集成、高可靠性等特点给科学研究和技术应用带来了巨大的影响.超短高能量脉冲光纤激光器在通信、传感、精密机械加工、材料处理、超快诊断、生物医学和国防军事等领域均有重要的应用.如何提高激光脉冲的功率和能量,掌握和利用超短脉冲光纤激光的复杂非线性,开展大功率、高能量、超宽带全光纤超短脉冲激光应用的关键技术研究,成为光纤脉冲激光新现象、新方法和实现技术体系突破的重大科学问题.本文简要总结了近年来国内外关于锁模光纤激光器研究的一些关键技术和重要成果,分析了各类激光器及所产生脉冲的优缺点,并介绍了过去几年中我们对如何提高光纤脉冲激光器性能和实现新型脉冲的研究成果.重点讨论了不同色散区内光纤激光器的典型行为特征,从理论与实验两方面揭示了传统孤子和多种耗散孤子的产生机理、输出特性及其演化规律.此外,还介绍了几种新型的高能量无波分裂脉冲.本文的成果可为进一步研究新型高能量脉冲提供有益的理论及实验基础.通过这些介绍和讨论,期望同行能够共同研究和探索基于新型锁模技术超短超强脉冲的新现象和新机理,并且在超短高能量脉冲的极端非线性科学问题上获得新认识.
Fiber lasers have a huge impact on scientific research and technology applications with high beam quality, high efficiency, high integration, high reliability, etc. Ultrashort high-energy pulsed fiber lasers have been widely used in communication, sensing, precision machining, material processing , Ultrafast diagnostics, biomedicine and defense and military fields.How to improve the power and energy of laser pulse, to master and utilize the complex nonlinearity of ultrashort pulsed fiber laser, and to carry out high power, high energy, ultra wideband The research on the key technology of the application of optical fiber ultrashort pulse laser has become a major scientific issue of the new phenomenon, new method and breakthrough of the technology system of fiber pulsed laser.This paper briefly summarizes some key technologies and important research on mode-locked fiber laser in recent years The advantages and disadvantages of various types of lasers and the generated pulses are analyzed and the results of our research on how to improve the performance of the pulsed fiber lasers and how to realize the new pulsed lasers in the past few years are introduced.The typical behavior of fiber lasers in different dispersion regions Characteristics, from both theoretical and experimental revealed the traditional soliton and a variety of dissipation The generation mechanism of the soliton, the output characteristics and the evolution of the soliton.In addition, several new types of high-energy wave-free splitting pulses are also introduced.The results of this paper can provide useful theoretical and experimental basis for further research on new high-energy pulses.Through these introduction And discussions, we hope that our colleagues can jointly research and explore new phenomena and new mechanisms based on the new mode-locked ultrashort pulse and gain new understanding on the extreme non-linear science of ultrashort high-energy pulse.