摘要
报道了一种基于国产非成对设计的啁啾镜作为腔内色散补偿的钛宝石激光器,在93.7 MHz的重复频率下,得到了平均功率为120 mW的稳定的锁模脉冲输出,经腔外色散补偿,得到了最窄9.7 fs的脉冲宽度。通过调节腔内光楔的插入量,研究了锁模光谱与自相关曲线随腔内净色散的演化过程。基于非线性薛定谔方程的分步傅里叶算法对激光器建立了数值模型,数值模拟的参数选取均与实验中完全一致,利用10阶泰勒展开模拟啁啾镜的色散曲线振荡,获得了谐振腔零色散点附近锁模的动力学过程,并分析了啁啾镜的高阶色散对脉冲宽度压缩的限制。
A Ti…sapphire laser with domestic un-paired chirped mirror for intracavity dispersion compensation is reported.Ultrashort optical pulses with mode-locked pulse output power of 120 mW are generated at a repetition rate of 93.7 MHz.The pulse duration as short as 9.7 fs is achieved after extracavity dispersion compensation.The spectrum and pulse autocorrelation trace evolution with intracavity dispersion are investigated by adjusting the insertion of intracavity wedge.A numerical model of the Ti…sapphire laser is also built based on the split-step Fourier method for solving nonlinear Schrdinger equation.The parameters used in the simulation are the same as in experiment.10 order of Taylor series are used for modeling oscillation of the dispersion curve of chirped mirror.The mode-locking dynamics in the vicinity of zero cavity dispersion is achieved,and the restriction of higher-order dispersion on pulse duration compressing is also analyzed.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第11期3215-3220,共6页
Acta Optica Sinica
基金
国家973计划(2010CB327604,2011CB808101)
国家863计划(2007AA03Z447)
国家自然科学基金(61078028,60838004,60978022)
教育部科学技术研究重点项目(108032)
教育部新世纪优秀人才支持计划(NCET-07-0597)资助课题
全国优秀博士学位论文作者专项资金资助项目(2007B34)
关键词
激光器
钛宝石激光器
飞秒
啁啾镜
高阶色散
lasers
Ti…sapphire laser
femtosecond
chirped mirror
high-order dispersion
