CFEL-UFOX

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2017-06-23
11:17
[PUBDB-2017-05953] Contribution to a conference proceedings/Contribution to a book
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Towards a Fully Integrated Accelerator on a Chip: Dielectric Laser Acceleration (DLA) From the Source to Relativistic Electrons
8th International Particle Accelerator Conference, IPAC 2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
2520 - 2525 (2017) [10.18429/JACoW-IPAC2017-WEYB1]  GO
Dielectric laser acceleration of electrons has recently been demonstrated with significantly higher accelerating gradients than other structure-based linear accelerators. Towards the development of an integrated 1 MeV electron accelerator based on dielectric laser accelerator technologies, development in several relevant technologies is needed. [...]
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2017-06-19
15:04
OpenAccess [PUBDB-2017-05466] Master Thesis
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Passively mode-locked holmium-doped soliton fiber ring oscillator
82 p. (2017) [10.3204/PUBDB-2017-05466] = HAWK Hochschule für angewandte Wissenschaft und Kunst Hildesheim/Holzminden/Göttingen, Masterarbeit, 2017  GO
Ultrashort laser pulses are used in physical analysis techniques as well as in materials processing and are generated in passively mode-locked oscillators. However, those oscillators produce low pulse energies, but can be used as seeding sources for regenerative amplifiers. [...]
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2017-06-02
08:24
OpenAccess [PUBDB-2017-04175] Journal Article
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Tunable plasmon-enhanced birefringence in ribbon array of anisotropic two-dimensional materials
ddc:530
We explore the far-field scattering properties of anisotropic two-dimensional materials in ribbon array configuration. Our study reveals the plasmon-enhanced linear birefringence in these ultrathin metasurfaces, where linearly polarized incident light can be scattered into its orthogonal polarization or be converted into circular polarized light. [...]
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2017-05-23
08:04
OpenAccess [PUBDB-2017-03389] Master Thesis
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Passively mode-locked holmium-doped soliton fiber ring oscillator
82 p. (2017) [10.3204/PUBDB-2017-03389] = Hochschule für angewandte Wissenschaft und Kunst Hildesheim/Holzminden/Göttingen, Masterarbeit, 2017  GO
Ultrashort laser pulses are used in physical analysis techniques as well as in materials processing and are generated in passively mode-locked oscillators. However, those oscillators produce low pulse energies, but can be used as seeding sources for regenerative amplifiers. [...]
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2017-05-19
11:38
OpenAccess [PUBDB-2017-03217] Journal Article
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Breaking the Femtosecond Barrier in Multi-km Timing Synchronization Systems
ddc:530
To observe electronic dynamics in atoms, molecules, and condensed matter taking place on an attosecond time scale, next-generation photon science facilities like X-ray free-electronlasers and intense laser beamlines require system-wide attosecondlevel synchronization of dozens of optical andmicrowave signals up to kilometer distances. Here, we present for the first time a timing synchronization system that can meet the strict timing requirements of such large-scale facilities. [...]
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2017-05-17
11:16
[PUBDB-2017-03059] Journal Article
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Narrowband terahertz generation wich chirped-and-delayed laser pulses in periodically poled lithium niobate
Optics letters 42(11), 2118 - 2121 (2017) [10.1364/OL.42.002118]  GO
ddc:530
We generate narrowband terahertz (THz) radiation in periodically poled lithium niobate (PPLN) crystals using two chirped-and-delayed driver pulses from a high-energy Ti:sapphire laser. The generated frequency is determined by the phase-matching condition in the PPLN and influences the temporal delay of the two pulses for efficient terahertz generation. [...]
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2017-05-02
09:45
[PUBDB-2017-02126] Journal Article
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Red-diode-pumped Cr:Nd:GSGG laser: two-color mode-locked operation
ddc:530
We have investigated in detail the continuous-wave (cw) and mode-locked performance of a diode-pumped Cr:Nd:GSGG laser. State-of-the-art single-mode and multimode laser diodes around 665 nm were used as pump sources. [...]
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2017-04-26
13:10
OpenAccess [PUBDB-2017-01934] Book/Report/Dissertation / PhD Thesis
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Large-scale laser-microwave synchronization for attosecond photon science facilities
[DESY-THESIS-2017-015]
DESY-THESIS 134 pp. (2017) [10.3204/PUBDB-2017-01934] = Universität Hamburg, Diss., 2017  GO
Low-noise transfer of time and frequency standards over large distances provides high temporal resolution for ambitious scientific explorations such as sensitive imaging of astronomical objects using multi-telescope arrays, comparison of distant optical clocks or gravitational-wave detection using large laser interferometers. In particular, rapidly expanding photon science facilities such as X-ray free-electron lasers (FELs) and attoscience centers have the most challenging synchronization requirements of sub-fs timing precision to generate ultrashort X-ray pulses for the benefit of creating super-microscopes with sub-atomic spatiotemporal resolution. [...]
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2017-04-26
08:11
[PUBDB-2017-01911] Journal Article
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100-nm tunable femtosecond Cr:LiSAF laser mode locked with a broadband saturable Bragg reflector
Applied optics 56(13), 3812 - 3816 (2017) [10.1364/AO.56.003812]  GO
ddc:530
We report broad tunability of a femtosecond (fs) diode-pumped Cr:LiSAF laser mode-locked with a broadband saturable Bragg reflector (SBR). The SBR had seven pairs of Al$_𝑥$O$_𝑦$(𝑛∼1.5) and Al$_{0.17}$Ga$_{0.83}$As(𝑛∼3.5) layers in its Bragg stack, enabling a 250 nm reflectivity bandwidth around 850 nm. [...]
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2017-04-25
13:09
OpenAccess [PUBDB-2017-01878] Journal Article
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THz cavities and injectors for compact electron acceleration using laser-driven THz sources
ddc:530
We present a design methodology for developing ultrasmall electron injectors and accelerators based on cascaded cavities excited by short multicycle THz pulses obtained from laser-driven THz generation schemes. Based on the developed concept for optimal coupling of the THz pulse, a THz electron injector and two accelerating stages are designed. [...]
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