FS-LA

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2018-03-29
13:22
[PUBDB-2018-01601] Contribution to a conference proceedings/Contribution to a book
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Operation of a seeded XUV free electron laser at DESY with high-gain harmonic generation seeding
Conference on Lasers and Electro-Optics : [Proceedings] - OSA Washington, D.C., 2017. - ISBN 978-1-943580-27-9 - doi:10.1364/CLEO_AT.2017.JTu4L.5
CLEO: Applications and Technology, CLEO 2017, Meeting locationSan Jose, California, 14 May 2017 - 19 May 20172017-05-142017-05-19
Washington, DC : OSA, OSA technical digest (online), JTu4L.5 (2017) [10.1364/CLEO_AT.2017.JTu4L.5]  GO
The XUV free electron laser FLASH has been recently operated in the high-gain harmonic generation (HGHG) mode. We characterized the laser-induced energy modulation, as well as the temporal profile of the seeded FEL pulses. [...]

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2018-03-05
12:58
OpenAccess [PUBDB-2018-01375] Journal Article
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Near- and Extended-Edge X-Ray-Absorption Fine-Structure Spectroscopy Using Ultrafast Coherent High-Order Harmonic Supercontinua
Recent advances in high-order harmonic generation have made it possible to use a tabletop-scale setup to produce spatially and temporally coherent beams of light with bandwidth spanning 12 octaves, from the ultraviolet up to x-ray photon energies >1.6 keV. Here we demonstrate the use of this light for x-ray-absorption spectroscopy at the K- and L-absorption edges of solids at photon energies near 1 keV. [...]
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2018-02-22
11:19
[PUBDB-2018-01285] Contribution to a conference proceedings/Contribution to a book
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Sub-optical-cycle control of free electrons by optical near-fields
European Quantum Electronics Conference 2017
European Quantum Electronics Conference, EQEC 2017, EQEC 2017, Meeting locationMunich, Germany, 25 Jun 2017 - 29 Jun 20172017-06-252017-06-29
Washington, DC : OSA, The Optical Society, OSA technical digest , Online-Ressource (2017)

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2018-02-13
12:04
[PUBDB-2018-01169] Conference Presentation
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Intensity noise in mid-IR frequency combs based on difference frequency generation
CLEO Europe 2017, Meeting locationMunich, Germany, 25 Jun 2017 - 29 Jun 20172017-06-252017-06-29

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2018-02-01
12:06
[PUBDB-2018-00971] Conference Presentation
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Widely Tunable Mid-IR, High Signal-to-Noise Frequency Comb based Fourier Transform Spectrometer
CLEO: Science and Innovations, Meeting locationSan Jose, California, 14 May 2017 - 19 May 20172017-05-142017-05-19  GO
We present an optical frequency comb based Fourier Transform Spectrometer, covering 3.0 to 5.2 μm with 2 m optical path delay and a signal-to-noise ratio of 800 in 40 s acquisition time at 4.6 μm..

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2018-01-12
10:54
[PUBDB-2018-00600] Journal Article
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Intensity noise coupling in soliton fiber oscillators
Optics letters 42(24), 5266 - 5269 (2017) [10.1364/OL.42.005266]  GO
We present an experimental and numerical study on the spectrally resolved pump-to-output intensity noise coupling in soliton fiber oscillators. In our study, we observe a strong pump noise coupling to the Kelly sidebands, while the coupling to the soliton pulse is damped. [...]
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2018-01-11
16:59
OpenAccess [PUBDB-2018-00565] Journal Article
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Optical gating and streaking of free electrons with sub-optical cycle precision
The temporal resolution of ultrafast electron diffraction and microscopy experiments is currently limited by the available experimental techniques for the generation and characterization of electron bunches with single femtosecond or attosecond durations. Here, we present proof of principle experiments of an optical gating concept for free electrons via direct time-domain visualization of the sub-optical cycle energy and transverse momentum structure imprinted on the electron beam [...]
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2018-01-11
14:07
OpenAccess [PUBDB-2018-00503] Journal Article
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Generation of three-dimensional versatile vortex linear light bullets (Invited Paper)
We generate and measure the versatile vortex linear light bullet, which combines a high-order Bessel beam and an Airy pulse. This three-dimensional optical wave packet propagates without distortion in any medium, while carrying an orbital angular momentum. [...]
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2018-01-11
13:43
OpenAccess [PUBDB-2018-00492] Journal Article
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Monolithic optofluidic mode coupler for broadband thermo- and piezo-optical characterization of liquids
Optics express 25(19), 22932-22946 (2017) [10.1364/OE.25.022932]  GO
We present a monolithic fiber device that enables investigation of the thermo- and piezo-optical properties of liquids using straightforward broadband transmission measurements. The device is a directional mode coupler consisting of a multi-mode liquid core and a single-mode glass core with pronounced coupling resonances whose wavelength strongly depend on the operation temperature. [...]
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2018-01-11
13:31
OpenAccess [PUBDB-2018-00487] Journal Article
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Acceleration of sub-relativistic electrons with an evanescent optical wave at a planar interface
Optics express 25(16), 19195 - 19204 (2017) [10.1364/OE.25.019195]  GO
We report on a theoretical and experimental study of the energy transfer between an optical evanescent wave, propagating in vacuum along the planar boundary of a dielectric material, and a beam of sub-relativistic electrons. The evanescent wave is excited via total internal reflection in the dielectric by an infrared $(λ = 2 μm)$ femtosecond laser pulse. [...]
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