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xtraction of internal phase motions in femtosecond soliton molecules using an orbital-angular-momentum-resolved method

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Photonics Research 2020年第10期8卷 1580-1585页

作者： YuweI ZHAO JNTAO FAN YOUJIAN SONG uwe morgner MINGLIE HU Uitrafast Laser Laboratory Key Laboratory of Opto-electronic Information Science and Technology of Mlinistry of EducationSchool of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Institut fiur Quanteroptik Leibniz Universitat HannoverWelfengarten 130167 HaninaverGermeny Cluster of Excellence PhoenixD(Photonics Opticsand Engineering-rnrnovation Across Disciplines)30167 HannoverGermany Laser Zentrum Hannover e.V Hollerithalice 830419 HannoverGermany

Internal motions in femtosecond soliton molecules provide insight into universal collective dynamics in various nonlinear *** we introduce an orbital-angular-momentum(OAM)-resolved method that maps the relative phase motion within a femtosecond soliton molecule into the rotational movement of the interferometric beam profile of two optical *** this means,long-term relative phase evolutions of doublet and triplet soliton molecules generated in an all-polarization-maintaining mode-locked Er-fiber laser are *** simple and practical OAM-resolved method represents a promising way to directly visualize the complex phase dynamics in a diversity of multisoliton structures.

关键词： polarization soliton resolved

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Widely tunable,high-power,femtosecond noncollinear optical parametric oscillator in the visible spectral range

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Photonics Research 2021年第9期9卷 1715-1718页

作者： ROBIN MEVERT YULIYA BINHAMMER CHRISTIAN M.DIETRICH LUISE BEICHERT JOSéR.CARDOSO DE ANDRADE THOMAS BINHAMMER JINTAO FAN uwe morgner Institute of Quantum Optics Leibniz University HannoverWelfengarten 1D-30167 HannoverGermany Cluster of Excellence PhoenixD Welfengarten 1D-30167 HannoverGermany neoLASE GmbH Hollerithallee 17D-30419 HannoverGermany

Ultrafast visible radiation is of great importance for many applications ranging from spectroscopy to *** some regions in the visible range are not covered by laser gain media,optical parametric oscillators offer an added *** a high-power broadband laser source,the ability to rapidly tune the frequency of pulses with high-power spectral density offers an extra benefit for experiments such as multicolor spectroscopy or ***,we demonstrate a broadband,high-power,rapidly tunable femtosecond noncollinear optical parametric oscillator with a signal tuning range of 440–720 nm in the visible *** oscillator is pumped by the third harmonic of an Yb-fiber laser at 345 nm with a repetition rate of 50.2 ***,the signal wavelength is tuned by changing the cavity length only,and output powers up to 452 m W and pulse durations down to 268 fs are *** is,to the best of our knowledge,the first demonstration of a quickly tunable femtosecond optical parametric oscillator that covers nearly the entire visible spectral range with high output power.

关键词： tunable power tuning

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Simple route toward efficient frequency conversion for generation of fully coherent supercontinua in the mid-IR and UV range

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Light(Science & Applications) 2016年第1期5卷 216-223页

作者： Ihar Babushkin Ayhan Tajalli Hakan Sayinc uwe morgner Günter Steinmeyer Ayhan Demircan Institute of Quantum Optics Leibniz Universität Hannover30167 HanoverGermany Max Born Institute(MBI) 12489 BerlinGermany Laser Zentrum Hannover e.V. 30419 HanoverGermany Hanover Centre for Optical Technologies 30167 HanoverGermany

Fiber supercontinua represent light sources of pivotal importance for a wide range of applications,ranging from optical communications to frequency *** spectra encompassing more than three octaves can be produced,the applicability of such spectra is strongly hampered due to coherence degradation during spectral *** pulse parameters at the cutting edge of currently available laser technology,we demonstrate the possibility of strongly coherent supercontinuum *** a fiber with two zero-dispersion wavelengths a higher-order soliton experiences a temporal breakdown,without any compression or splitting behavior,which leads to nearly complete conversion of input solitonic radiation into resonant nonsolitonic radiation in the dispersive wave *** the process is completely deterministic and shows little sensitivity to input noise,the resulting pulses appear to be compressible down to the sub-cycle level and may thus hold a new opportunity for direct generation of attosecond pulses in the visible to near ultraviolet wavelength range.

关键词： attosecond pulses optical solitons supercontinuum ultrashort pulses

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