PPLN晶体差频测量飞秒激光脉冲的载波包络相移  

Measurement of carrier-envelope phase of few cycles Ti:sapphire laser by difference frequency technique

作　　者：韩海年[1,2] 赵研英[1] 张炜[1] 朱江峰[1] 王鹏[1] 魏志义[1] 李师群[2] 

机构地区：[1]中国科学院物理研究所北京凝聚态物理国家实验室,光物理实验室,北京100080 [2]清华大学物理系原子分子与光物理研究所,北京100084

出　　处：《物理学报》2007年第5期2756-2759,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60225005;60490280);中国科学院知识创新方向性项目资助的课题~~

摘　　要：在飞秒激光频率梳系统中,通常采用自参考技术测量飞秒激光脉冲的载波包络相移,但该技术需要采用光子晶体光纤进行光谱扩展从而增加了系统的不稳定性,这种技术已经制约了高稳定度的飞秒激光频率梳的发展.采用PPLN晶体差频法测量了宽谱钛宝石振荡器输出的7fs激光脉冲的载波包络频移,得到了大于30dB的拍频信号,为研制无光纤的新一代高稳定度光学频率梳奠定了基础.The self-reference technique is widely used to measure the carrier-envelope phase offset （CEO） of femtosecond laser pulses in the normal femtosecond laser frequency comb system. However, the instability of the frequency comb system is increased because the photonic crystal fiber is introduced into the system to broaden the spectrum of femtosecond laser pulses outside the cavity. In this paper, we presented another method to measure specifically the CEO for the broad spectrum Ti.sapphire oscillator with the pulse duration of 7 fs, namely the difference frequency technique, with which we have obtained the beat frequency signal with a S/N ratio greater than 30 dB. This provided a good precondition for the next generation of the femtosecond laser frequency comb system without the photonic crystal fiber.

关 键 词：飞秒光学频率梳 自参考技术 差频技术 载波包络相移 

分 类 号：TN249[电子电信—物理电子学]