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Nonlinearity-tailored fiber laser technology for low-noise, ultra-wideband tunable femtosecond light generation

Photonics Research 2017年第6期5卷 262-273页

作者： XIAOMIN LIU JESPER LAEGSGAARD ROMAN IEGOROV ASK S.SVANE F.OMER ILDAY HAOHUA TU STEPHEN A.BOPPART DMITRY TURCHINOVICH DTU Fotonik Technical University of Denmark Max Planck Institute for Polymer Research Department of Physics Bilkent University National Research Tomsk Polytechnic University Institute of Power Engineering Department of Electrical and Electronics Engineering Bilkent University Biophotonics Imaging Laboratory University of Illinois at Urbana-Champaign Fakultat fur Physik Universitat Duisburg-Essen

The emission wavelength of a laser is physically predetermined by the gain medium used. Consequently, arbitrary wavelength generation is a fundamental challenge in the science of light. Present solutions include optical parametric generation, requiring complex optical setups and spectrally sliced supercontinuum, taking advantage of a simpler fiber technology: a fixed-wavelength pump laser pulse is converted into a spectrally very broadband output, from which the required resulting wavelength is then optically filtered. Unfortunately, this process is associated with an inherently poor noise figure, which often precludes many realistic applications of such supercontinuum sources. Here, we show that by adding only one passive optical element—a tapered photonic crystal fiber—to a fixed-wavelength femtosecond laser, one can in a very simple manner resonantly convert the laser emission wavelength into an ultra-wide and continuous range of desired wavelengths, with very low inherent noise, and without mechanical realignment of the laser. This is achieved by exploiting the double interplay of nonlinearity and chirp in the laser source and chirp and phase matching in the tapered fiber. As a first demonstration of this simple and inexpensive technology, we present a femtosecond fiber laser continuously tunable across the entire red–green–blue spectral range.

关键词： length PCF Nonlinearity-tailored fiber laser technology for low-noise ultra-wideband tunable femtosecond light generation

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High energy density physics with intense ion beams

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Matter and Radiation at Extremes 2016年第1期1卷 28-47页

作者： Boris Yu.Sharkov Dieter H.H.Hoffmann Alexander A.Golubev Yongtao Zhao FAIR GmbH:Facility for Antiproton and Ion Research in Europe GmbH PlanckstraBe 164291 DarmstadtGermany Institut fur Kernphysik Technische Universitat DarmstadtSchlossgartenstrasse 964289 DarmstadtGermany State Scientific Center Russian Federation e Institute for Theoretical and Experimental Physics of National Research Center“Kurchatov Institute”(SSC RF ITEP of NRC“Kurchatov Institute”) FSBI SSC RF ITEPBolshaya Cheremushkinskaya25117218 MoscowRussia School of Science Xi'an Jiaotong University and Institute of Modern PhysicsCASXianning West Road 28#Xi'an 710049PR China National Research Nuclear University MEPhI MoscowRussia National Research Nuclear University《MEPhI》Kashirskoe shosse31115409 MoscowRussia Institute of Modern Physics CASLanzhou 730000PR China

We review the development of High Energy Density Physics(HEDP)with intense heavy ion beams as a tool to induce extreme states of *** development of this field connects intimately to the advances in accelerator physics and *** will cover the generation of intense heavy ion beams starting from the ion source and follow the acceleration process and transport to the *** limitations and potential solutions to overcome these limitations are *** is exemplified by citing examples from existing machines at the gesellschaft fur Schwerionenforschung(GSI-Darmstadt),the Institute of Theoretical and Experimental Physics in Moscow(ITEP-Moscow),and the Institute of Modern Physics(IMP-Lanzhou).Facilities under construction like the FAIR facility in Darmstadt and the High Intensity Accelerator Facility(HIAF),proposed for China will be *** elsewhere are covered where it seems appropriate along with a report of recent results and achievements.

关键词： High energy density physics Ion driven fusion Warm dense matter

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