色散渐减光纤对增益光纤生成的自相似脉冲的优化研究  

Optimization of Self-Similarity Pulses in Dispersion Decreasing Fibers

作　　者：陈楚浜 张巧芬[1] 吴铭扬 王桂棠[1,2] 吴黎明[1] 邓耀华[1] CHEN Chu-bang;ZHANG Qiao-fen;WU Ming-yang;WANG Gui-tang;WU Li-ming;DENG Yao-hua(College of Mechanical and Electrical Engineering,Guangdong University of Technology,Guangzhou 510006,China;Guangzhou University of Technology CNC Equipment Collaborative Innovation Research Institute,Cangke Intelligent Technology Company Limited,Foshan,528225,China)

机构地区：[1]广东工业大学机电工程学院,广东广州1510006 [2]广东工业大学数控装备协同创新研究院、沧科智能科技有限公司,广东佛山528225

出　　处：《量子光学学报》2024年第1期69-77,共9页Journal of Quantum Optics

基　　金：国家自然科学青年基金(61705045);佛山市2021年高校教师特色创新研究项目(2021DZXX15)。

摘　　要：脉冲在增益光纤中进行自相似演化时,随着能量的放大,增益光纤中的增益饱和能量与增益带宽对脉冲造成的畸变也愈发明显,影响了增益光纤生成的自相似脉冲质量,限制了大能量、高质量的自相似脉冲的获取。本文利用色散渐减光纤(DDF)进一步优化脉冲在增益光纤中的自相似演化进程,在确保获得大能量的同时提高自相似脉冲的质量。论文不仅在理论上解释了DDF对增益光纤生成自相似脉冲进行优化的可行性,而且搭建了相应模型进行仿真验证,并分析了不同类型的DDF对优化效果的影响。结果表明,DDF成功对增益光纤中的自相似脉冲进行优化,其自相似评价因子从0.0517降低到0.0286。同时,在对不同色散曲线的DDF的分析中,得出双曲型DDF对自相似脉冲优化后能够产生最佳的压缩脉冲,最终获得峰值功率为11034 W、半高全宽为129 fs的低旁瓣超短脉冲。该研究对获取具有大能量、高质量的自相似脉冲具有一定指导意义。When self-similar pulses are generated in the gain fiber,the effect of gain saturation energy and gain bandwidth on pulse distortion increases with the increasing energy,resulting in the inability to obtain highenergy,highquality selfsimilar pulses.This paper focuses on the use of dispersion decreasing fiber(DDF)to further optimize the self-similarity evolution process of pulses in gain fibers,ensuring the quality of self-similarity pulses with high-energy in gain fibers.The feasibility of using DDF to optimize self-similar pulses generated in gain fibers is analyzed theoretically and verified numerically.The effect of different types of DDF on the optimization effect is also analyzed.The simulation results show that after using DDF optimization,the selfsimilarity evaluation factor decreases from 0.0517 to 0.0286,indicating that DDF effectively optimizes the self-similarity pulses generated by gain fibers.Meanwhile,by analyzing different shaped DDFs,it was found that hyperbolic shaped-DDF can achieve the best optimization results,obtaining low pedestal ultra short pulses with a peak power of 11034 W and a full width at half maximum(FWHM)of 129 fs.This study has certain implications for obtaining self-similar pulses with high-energy and high-quality.

关 键 词：非线性光学 自相似脉冲 色散渐减光纤 增益光纤 

分 类 号：O437[机械工程—光学工程]