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超宽光谱掺钛蓝宝石飞秒激光器时域频域特性的实验研究
Experimental investigation on temporal and spectral characteristics of femtosecond-scaled ultra-broadband Ti:sapphire oscillator
【摘要】 系统地研究了超宽光谱(Δλ>100nm)情况下,掺钛蓝宝石飞秒激光振荡器时域和频域特性,观测到腔内光谱从40nm带宽的sech2型演化至180nm带宽的多峰结构,以及脉冲在时域相应的成型过程.实验表明随着光谱的加宽,脉冲的变窄主要体现在其中部,而脉冲底部并未变窄,其包含的能量反而相对增加.
【Abstract】 In this letter, we systematically investigated the temporal and spectral characteristic of ultra broad band Ti:sapphire oscillator in femtosecond regime. Pulse formation in temporal regime was observed while the spectral shape evolved from hyperbolic secant shape into multi peak one and the bandwidth increased from 40 to 180nm. Experimental results showed that pulse shortening mainly occurred not at its bottom part but at its central section while the spectrum was broadened, and at the same time the relative energy at the bottom part increased.
【关键词】 掺钛蓝宝石激光器;
飞秒脉冲;
超宽光谱;
时频特性;
【Key words】 Ti:sapphire oscillator; femtosecond pulse; ultra broadband spectrum; temporal and spectral characteristic;
【Key words】 Ti:sapphire oscillator; femtosecond pulse; ultra broadband spectrum; temporal and spectral characteristic;
【基金】 国家自然科学基金(批准号:60278003,60178007);国家重点基础研究计划(“973”计划)(批准号:G19990752012,2003CB314904);国家高技术研究发展计划“863”基金(批准号:2003AA311010);高等学校优秀青年教师教学及研究奖励基金资助的课题.~~
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2005年07期
- 【分类号】TN248.1
- 【被引频次】14
- 【下载频次】274