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Yb-doped large-pitch fibres: effective single-mode operation based on higher-order mode delocalisation

Light(Science & Applications) 2012年第1期1卷 118-122页

作者： Jens Limpert fabian stutzki Florian Jansen Hans-Jurgen Otto Tino Eidam Cesar Jauregui Andreas Tunnermann Institute of Applied Physics Abbe Center of PhotonicsFriedrich-Schiller-Universitat Jena07745 JenaGermany Helmholtz Institute Jena 07743 JenaGermany Fraunhofer Institute for Applied Optics and Precision Engineering 07745 JenaGermany

Rare earth-doped fibres are a diode-pumped,solid-state laser architecture that is highly scalable in average *** performance of pulsed fibre laser systems is restricted due to nonlinear ***,fibre designs that allow for very large mode areas at high average powers with diffraction-limited beam quality are of enormous ***-doped,rod-type,large-pitch fibres(LPF)enable extreme fibre dimensions,i.e.,effective single-mode fibres with mode sizes exceeding 100 times the wavelength of the guided radiation,by exploiting the novel concept of delocalisation of higher-order transverse *** non-resonant nature of the operating principle makes LPF suitable for high power *** design allows for an unparalleled level of performance in pulsed fibre lasers.

关键词： higher-order mode delocalisation high-power fibre lasers and amplifiers photonic-crystal fibre very large mode area

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Watt-scale super-octave mid-infrared intrapulse difference frequency generation

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Light(Science & Applications) 2018年第1期7卷 124-131页

作者： Christian Gaida Martin Gebhardt Tobias Heuermann fabian stutzki Cesar Jauregui Jose Antonio-Lopez Axel Schulzgen Rodrigo Amezcua-Correa Andreas Tunnermann Ioachim Pupeza Jens Limpert Institute of Applied Physics Abbe Center of PhotonicsFriedrich-Schiller-Universitat JenaAlbert-Einstein-Str.1507745 JenaGermany Helmholtz-Institute Jena Frobelstieg 307743 JenaGermany Fraunhofer Institute for Applied Optics and Precision Engineering Albert-Einstein-Str.707745 JenaGermany CREOL College of Optics and PhotonicsUniversity of Central FloridaOrlandoFL 32816USA Max-Planck-Institute of Quantum Optics Hans-Kopfermann-Str.185748 GarchingGermany

The development of high-power,broadband sources of coherent mid-infrared radiation is currently the subject of intense research that is driven by a substantial number of existing and continuously emerging applications in medical diagnostics,spectroscopy,microscopy,and fundamental *** of the major,long-standing challenges in improving the performance of these applications has been the construction of compact,broadband mid-infrared radiation sources,which unify the properties of high brightness and spatial and temporal *** to the lack of such radiation sources,several emerging applications can be addressed only with infrared(IR)-beamlines in largescale synchrotron facilities,which are limited regarding user access and only partially fulfill these ***,we present a table-top,broadband,coherent mid-infrared light source that provides brightness at an unprecedented level that supersedes that of synchrotrons in the wavelength range between 3.7 and 18μm by several orders of *** result is enabled by a high-power,few-cycle Tm-doped fiber laser system,which is employed as a pump at 1.9μm wavelength for intrapulse difference frequency generation(IPDFG).IPDFG intrinsically ensures the formation of carrierenvelope-phase stable pulses,which provide ideal prerequisites for state-of-the-art spectroscopy and microscopy.

关键词： pump coherent difference

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