CFEL-UFOX

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2020-01-28
10:18
[PUBDB-2020-00578] Lecture

How to shrink accelerators and light sources
Lecture at Max planck institute for light (Germany),

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2020-01-28
10:08
[PUBDB-2020-00574] Talk (non-conference)

Integrated rare-eartth doped mode-locked lasers for photonic ADCs and optical frequency synthesis
Seminar, Aalto UniversityHelsinki, Aalto University, Finland, 20 Feb 20192019-02-20

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2020-01-28
09:51
[PUBDB-2020-00568] Talk (non-conference)

Photo cathodes for terahertz driven electron and coherent X-ray sources
EWPAA Workshop, Paul-Scherrer InstituteVilligen, Paul-Scherrer Institute, 11 Sep 20192019-09-11

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2020-01-22
10:11
OpenAccess [PUBDB-2020-00452] Journal Article
et al
Novel method for the angular chirp compensation of passively CEP-stable few-cycle pulses
Optics express 28(3), 3171 - 3178 () [10.1364/OE.384290]  GO
We demonstrate a novel, energy-efficient, cost-effective simple method for seeding CEP-stable OPCPAs. We couple the CEP-stable idler of a broadband OPCPA into a hollow core Kagome fiber thus compensating for the angular chirp. [...]
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ddc:530
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2020-01-16
14:08
OpenAccess [PUBDB-2020-00333] Journal Article

Towards high power longwave mid-IR frequency combs: power scalability of high repetition-rate difference-frequency generation
Optics express Optics Express(2), 1369-1384 () [10.1364/OE.28.001369]  GO
Frequency combs in the mid-IR wavelength are usually implemented by difference-frequency generation (DFG) that mixes pump pulses and signal pulses. Different from most optical parametric amplifiers that operate at a typical low repetition rate of <0.1 MHz, mid-IR frequency combs require that pump/signal pulse repetition rate must be at least as high as tens of MHz (normally >30 MHz). [...]
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ddc:530
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2020-01-15
11:29
OpenAccess [PUBDB-2020-00284] Journal Article
et al
20-mJ, sub-ps pulses at up to 70 W average power from a cryogenic Yb:YLF regenerative amplifier
Optics express 28(2), 2466 - () [10.1364/OE.384968]  GO
We report, what is to our knowledge, the highest average power obtained directly from a Yb:YLF regenerative amplifier to date. A fiber front-end provided seed pulses with an energy of 10 nJ and stretched pulsewidth of around 1 ns. [...]
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ddc:530
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2020-01-07
13:50
Embargoed OpenAccess [PUBDB-2020-00045] Journal Article

Alexandrite: an attractive thin-disk laser material alternative to Yb:YAG?
Yb:YAG thin-disk (TD) technology has enabled construction of laser/amplifier systems with unprecedented average/peak power levels, and has become the workhorse of many scientific investigations. On the other hand, for some applications, the narrow emission bandwidth of Yb:YAG limits its potential, and the search for alternative broadband TD gain media with suitable thermo-optomechanical parameters is ongoing. [...]
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ddc:620
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2019-12-19
09:52
[PUBDB-2019-05452] Master Thesis
et al
Sub-Cycle Nonlinear PulsePropagation
86 pp. () = Masterarbeit, University of Hamburg, 2019
Isolated few-cycle pulses are used as driving fields for high-harmonicgeneration (HHG) and in pump-probe experiments. In this work awave equation solver was developed, describing the propagation ofpulses with few- to sub-cycle duration in a nonlinear gas medium.The 1-D numerical model is used to investigate the behaviour insidehollow-core fibers. [...]
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2019-12-18
22:29
OpenAccess [PUBDB-2019-05449] Journal Article
et al
Supercontinuum generation in varying dispersion and birefringent silicon waveguide
Optics express 27(22), 31698 - () [10.1364/OE.27.031698]  GO
Ability to selectively enhance the amplitude and maintain high coherence of the supercontinuum signal with long pulses is gaining significance. In this work, an extra degree of freedom afforded by varying the dispersion profile of a waveguide is utilized to selectively enhance supercontinuum [...]
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ddc:530
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2019-12-16
17:27
OpenAccess [PUBDB-2019-05315] Contribution to a conference proceedings
et al
Timing Stability Comparison Study of RF Synthesis Techniques
39th Free Electron Laser Conference, FEL19, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 325-327 () [10.18429/JACOW-FEL2019-WEP004]  GO
High-precision and low-noise timing transfer from a master clock to different end stations of a free-electron laser (FEL) is an essential task.[1] Timing precisions ranging from few tens of femtoseconds to sub-femtoseconds are required for seeded FELs and attosecond science centers. Mode-locked lasers referenced to RF standards are commonly used as master oscillators, due to their superior stability and timing precision, depicting timing jitter in the attosecond range.[2] In this matter, one of the biggest challenges is to transfer the timing stability of mode-locked lasers to RF sources. [...]
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