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.
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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第7期3159-3163,共5页
Acta Physica Sinica
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.~~
