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Supercontinuum generation and compression in a length of 50-mm photonic crystal fiber with pulse of nanojoule energy are investigated theoretically and experimentally. Chirped mirror pair is used for dispersion compensation and pulse compression. Pulse characteristics are measured by frequency-resolved optical gating. And 19-fs pulse is generated. 相似文献
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本文研究了一类退化漂移-扩散模型的混合边值问题.利用能量估计的方法,在边界数据和初始数据是严格正的条件下获得了此问题弱解的唯一性. 相似文献
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变系数3+1维三次-五次复金兹堡-朗道(CGL)方程作为光孤子传输模型,不仅用五次项解释了现有模型所没有的物理意义,还拥有高维系统较低维系统更为丰富的非线性动力学特性.本文利用修正的Hirota方法,得到了变系数3+1维三次-五次CGL方程的解析孤子解.通过对非线性系数和光谱滤波项选取特定的参数,得到了一种特殊的混合孤子.分别讨论了改变非线性、光谱滤波和线性损失参数以及其他参数对孤子传输特性的影响,实现了对亮孤子和混合孤子传输的有效控制.本文结论对高维CGL系统在理论和实验研究方面具有一定的参考价值. 相似文献
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光纤激光器作为推动各领域发展的基础硬件,在轨道交通、光纤通信、新材料制造、动力电池加工、军事国防和医疗等领域都有广泛的应用价值.光纤激光器被动锁模技术的核心器件是可饱和吸收体,它对光纤激光器实现高能量、窄脉宽、大功率的激光输出起决定性作用.依托传统材料和传统结构的可饱和吸收体,由于无散热机制,光作用到材料上的光斑大小与光纤出射直径几乎相同,容易超过可饱和吸收体的损伤阈值从而造成损坏.因此,调整可饱和吸收体制备工艺和结构,对于提高可饱和吸收体的损伤阈值,实现性能优良、稳定性高的脉冲激光具有重要意义.本文综述了高损伤阈值可饱和吸收体国内外研究现状,指出了高损伤阈值可饱和吸收体可能的发展方向. 相似文献
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Soliton fusion and fission for the high-order coupled nonlinear Schr?dinger system in fiber lasers 下载免费PDF全文
With the rapid development of communication technology,optical fiber communication has become a key research area in communications.When there are two signals in the optical fiber,the transmission of them can be abstracted as a high-order coupled nonlinear Schr¨odinger system.In this paper,by using the Hirota’s method,we construct the bilinear forms,and study the analytical solution of three solitons in the case of focusing interactions.In addition,by adjusting different wave numbers for phase control,we further discuss the influence of wave numbers on soliton transmissions.It is verified that wave numbers k11,k21,k31,k22,and k32can control the fusion and fission of solitons.The results are beneficial to the study of all-optical switches and fiber lasers in nonlinear optics. 相似文献
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