Pulse compression of a high-order harmonic by compensating the atomic dipole phase

被引:72
作者
Sekikawa, T [1 ]
Ohno, T [1 ]
Yamazaki, T [1 ]
Nabekawa, Y [1 ]
Watanabe, S [1 ]
机构
[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
关键词
D O I
10.1103/PhysRevLett.83.2564
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The fifth harmonic pulses of an intense femtosecond Ti:sapphire laser are experimentally shown to be negatively chirped by using a LiF plate as a positive dispersive medium. The chirp of the harmonic pulse is originated from the intensity-dependent atomic dipole phase, which is estimated to be proportional to 25U(p), where U-p is the ponderomotive energy. Consequently, we have succeeded in compressing the chirped pulses to 13 fs by compensating the intrinsic negative chirp. Chirp effects of the fundamental laser on the pulse width of the fifth harmonic were also investigated.
引用
收藏
页码:2564 / 2567
页数:4
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