Quasi-supercontinuum source in the extreme ultraviolet using multiple frequency combs from high-harmonic generation

被引：17

作者：

Wuesnsche, Martin ^{[1
,2
]}

Fuchs, Silvio ^{[1
,2
]}

Aull, Stefan ^{[1
]}

Nathanael, Jan ^{[1
]}

Moeller, Max ^{[1
,2
]}

Roedel, Christian ^{[1
,3
]}

Paulus, Gerhard G. ^{[1
,2
]}

机构：

[1] Friedrich Schiller Univ Jena, Inst Opt & Quantum Elect, Max Wien Pl 1, D-07743 Jena, Germany

[2] Helmholtz Inst Jena, Frobelstieg 3, D-07743 Jena, Germany

[3] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 06期

关键词：

OPTICAL-COHERENCE TOMOGRAPHY; BROAD-BANDWIDTH XUV; X-RAY RADIATION; ATTOSECOND PULSES;

D O I：

10.1364/OE.25.006936

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A quasi-supercontinuum source in the extreme ultraviolet (XUV) is demonstrated using a table-top femtosecond laser and a tunable optical parametric amplifier (OPA) as a driver for high-harmonic generation (HHG). The harmonic radiation, which is usually a comb of odd multiples of the fundamental frequency, is generated by near-infrared (NIR) laser pulses from the OPA. A quasi-continuous XUV spectrum in the range of 30 to 100 eV is realized by averaging over multiple harmonic comb spectra with slightly different fundamental frequencies and thus different spectral spacing between the individual harmonics. The driving laser wavelength is swept automatically during an averaging time period. With a total photon flux of 4x10(9) photons/s in the range of 30 eV to 100 eV and 1x10(7) photons/s in the range of 100 eV to 200 eV, the resulting quasi-supercontinuum XUV source is suited for applications such as XUV coherence tomography (XCT) or near-edge absorption fine structure spectroscopy (NEXAFS). (C) 2017 Optical Society of America

引用

页码：6936 / 6944

页数：9

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