FS-LA

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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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2017-05-23
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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2017-05-10
10:10
OpenAccess [PUBDB-2017-02555] Journal Article
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Alignment, orientation, and Coulomb explosion of difluoroiodobenzene studied with the pixel imaging mass spectrometry (PImMS) camera
ddc:540
Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C$_6$H$_3$F$_2$I) molecules are probed by Coulomb explosion imaging following either near-infrared strong-field ionization or extreme-ultraviolet multi-photon inner-shell ionization using free-electron laser pulses. The resulting photoelectrons and fragment ions are captured by a double-sided velocity map imaging spectrometer and projected onto two position-sensitive detectors. [...]
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2017-04-12
10:21
OpenAccess [PUBDB-2017-01661] Journal Article
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Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser
ddc:530
In pump-probe experiments employing a free-electron laser (FEL) in combination with a synchronized optical femtosecond laser, the arrival-time jitter between the FEL pulse and the optical laser pulse often severely limits the temporal resolution that can be achieved. Here, we present a pump-probe experiment on the UV-induced dissociation of 2,6-difluoroiodobenzene $(C_{6}H_{3}F_{2}I)$ molecules performed at the FLASH FEL that takes advantage of recent upgrades of the FLASH timing and synchronization system to obtain high-quality data that are not limited by the FEL arrival-time jitter. [...]
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2017-04-06
08:33
OpenAccess [PUBDB-2017-01527] Journal Article
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Study on laser characteristics of Ho:YLF regenerative ampliers: Operation regimes, gain dynamics, and highly stable operation points
ddc:530
We present a comprehensive study of laser pulse amplification of Ho:YLF regenerative amplifiers (RAs) with respect to operation regimes, gain dynamics, and output pulse stability. The findings are expected to be more generic than for this specific gain material. [...]
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2017-02-21
13:22
[PUBDB-2017-01061] Poster
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Ultrafast fragmentation dynamics of Phenanthrene and Pyrene after photoionization at 30.3 nm wavelength
DESY User Meeting 2017, Meeting locationHamburg, Germany, 26 Jan 2017 - 27 Jan 20172017-01-262017-01-27

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2017-01-16
11:23
OpenAccess [PUBDB-2017-00571] Journal Article/Contribution to a conference proceedings/Contribution to a book
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High energetic and highly stable pulses from a Ho:YLF regenerative amplifier
Solid State Lasers XXV: Technology and Devices
Solid State Lasers XXV: Technology and Devices, SPIE LASE, Meeting locationSan Francisco, California, 15 Jul 2016 - 20 Jul 20162016-07-152016-07-20
Proceedings of SPIE 9726, 97260S (2016) [10.1117/12.2212236]  GO
ddc:620
We present results from our Ho:YLF regenerative amplifier (RA) producing up to 6.9 mJ at a repetition rate of 1 kHz and up to 12.9 mJ at a repetition rate of 10 Hz. At 1 kHz, we observe strongly bifurcating pulses, starting with certain round trip number, but the measurements identify a highly stable operation point that lies “hidden” beyond the instability region. [...]
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2017-01-10
08:01
[PUBDB-2017-00371] Journal Article
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Low noise, tunable Ho:fiber soliton oscillator for Ho:YLF amplifier seeding
ddc:530
We present a passively mode-locked, tunable soliton Ho:fiber ring oscillator, optimized for seeding of holmium-doped yttrium lithium flouride (Ho:YLF) amplifiers. The oscillator is independently tunable in central wavelength and spectral width from 2040 to 2070 nm and from 5 to 10 nm, respectively. [...]
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2017-01-10
07:49
Embargoed OpenAccess [PUBDB-2017-00366] Journal Article
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Out of the blue : semiconductor laser pumped visible rare-earth doped lasers
ddc:530
The rise of semiconductor-based pump sources such as In$_x$Ga$_{1-x}$N-laser diodes or frequency-doubled optically pumped semiconductor lasers with emission wavelengths in the blue encourages a revisitation of the rare-earth ions Pr$^{3+}$, Sm$^{3+}$, Tb$^{3+}$, Dy$^{3+}$, Ho$^{3+}$ and Er$^{3+}$ with respect to their properties as active ions in crystalline solid-state laser materials with direct emission in the visible spectral range. Nowadays, some of these blue-pumped visible lasers compete with Nd$^{3+}$-lasers in terms of efficiency and direct lasing at various colors from the cyan-blue to the deep red can be addressed in very simple and compact laser setups. [...]
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