INTENSE FAR-INFRARED FREE-ELECTRON LASER-PULSES WITH A LENGTH OF 6 OPTICAL CYCLES

被引：81

作者：

KNIPPELS, GMH

MOLS, RFXAM

VANDERMEER, AFG

OEPTS, D

VANAMERSFOORT, PW

机构：

[1] FOM Institute for Plasma Physics Rijnhuizen, NL-3430 BE Nieuwegein

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.75.1755

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Second-order optical autocorrelation measurements are reported for a far-infrared free-electron laser. Second-harmonic generation in an 840-mu m-long CdTe crystal is used to provide the nonlinear autocorrelation signal. At wavelengths of 10.4 and 24.5 mu m, FWHM pulse durations of 220 and 500 fs, respectively, are measured. In both cases this corresponds to six cycles of the optical field. The pulse energy ranges up to 25 mu J. Evidence is presented that each pulse evolves into a train of subpulses at large values of the cavity desynchronism.

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页码：1755 / 1758

页数：4

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