Temporal coherence of ultrashort high-order harmonic pulses

被引：332

作者：

Bellini, M

Lynga, C

Tozzi, A

Gaarde, MB

Hansch, TW

L'Huillier, A

Wahlstrom, CG

机构：

[1] European Lab Non Linear Spect LENS, I-50125 Florence, Italy

[2] INFM, Florence, Italy

[3] Lund Inst Technol, Dept Phys, S-22100 Lund, Sweden

[4] Univ Florence, Dept Phys, I-50125 Florence, Italy

[5] Niels Bohr Inst, Orsted Lab, DK-2100 Copenhagen, Denmark

[6] Max Planck Inst Quantenopt, D-85740 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.81.297

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the temporal coherence of high-order harmonics (up to the 15th order) produced by focusing 100 fs laser pulses into an argon gas jet. We measure the visibility of the interference fringes, produced when two spatially separated harmonic sources interfere in the far field, as a function of the time delay between the two sources. In general, we find long coherence times, comparable to the expected pulse durations of the harmonics. For some of the harmonics, the interference pattern exhibits two regions, with significantly different coherence times. These results are interpreted in terms of different electronic trajectories contributing to harmonic generation. [S0031-9007(98)05569-7].

引用

页码：297 / 300

页数：4

共 16 条

[1] Measurement of the temporal coherence of ultrashort harmonic pulses: towards coherent spectroscopy in the extreme ultraviolet [J].