Bright,high-repetition-rate water window soft X-ray source enabled by nonlinear pulse self-compression in an antiresonant hollow-core fibre  

作　　者：M.Gebhardt T.Heuermann R.Klas C.Liu A.Kirsche M.Lenski Z.Wang C.Gaida J.E.Antonio-Lopez A.Schülzgen R.Amezcua-Correa J.Rothhardt J.Limpert 

机构地区：[1]Institute of Applied Physics,Abbe Center of Photonics,Friedrich-Schiller-Universitat Jena,Albert-Einstein-Str.15,07745 Jena,Germany [2]Helmholtz-Institute Jena,Frobelstieg 3,07743 Jena,Germany [3]CREOL,College of Optics and Photonics,University of Central Florida,Orlando,FL 32816,USA [4]Fraunhofer Institute for Applied Optics and Precision Engineering,Albert-Einstein-Str.7,07745 Jena,Germany [5]Active Fiber Systems GmbH,Ernst-Ruska-Ring 17,07745 Jena,Germany

出　　处：《Light(Science & Applications)》2021年第3期313-319,共7页光（科学与应用)（英文版）

基　　金：The authors would like to thank Prof.Adrian Pfeiffer and Dr.Felix Kittig forfruitful discussions and help with the numerical methods.Furthermore,theauthors would like to thank Dr.Steffen Hadrich,Dr.Cesar Jauregui-Misas,andTobias Ulsperger for their help in the early stages of this work.This work wassupported by the European Research Council(ERC)under the EuropeanUnion's Horizon 2020 research and innovation programme(grant 835306,SALT);the Fraunhofer Cluster of Excellence Advanced Photon Sources(CAPS);the Helmholtz-Institute Jena,the U.S.Army Research Office(grant W911NF1910426);the U.S.Air Force Office of Scientific Research(grantFA9550-15-10041).

摘　　要：Bright,coherent soft X-ray radiation is essential to a variety of applications in fundamental research and life sciences.To date,a high photon flux in this spectral region can only be delivered by synchrotrons,free-electron lasers or high-order harmonic generation sources,which are driven by kHz-class repetition rate lasers with very high peak powers.Here,we establish a novel route toward powerful and easy-to-use SXR sources by presenting a compact experimentin which nonlinear pulse self-compression to the few-cycle regime is combined with phase-matched high-orderharmonic generation in a single,helium-illed antiresonant hollow-core fibre.This enables the first 100 kHz-classrepetition rate,table-top soft X-ray source that delivers an application-relevant flux of 2.8×10^6 photon s^-1 eV^-1 around 300 ev.The fibre integration of temporal pulse self-compression(leading to the formation of the necessarystrong-field waveforms)and pressure-controlled phase matching will allow compact,high-repetition-rate lasertechnology,including commercially available systems,to drive simple and cost-effective,coherent high-flux softX-ray sources.

关 键 词：PULSE REPETITION FIBRE 

分 类 号：O434.1[机械工程—光学工程]