Felix Köttig
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View article: Scaling rules for high quality soliton self-compression in hollow-core fibers
Scaling rules for high quality soliton self-compression in hollow-core fibers Open
Soliton dynamics can be used to temporally compress laser pulses to few fs durations in many different spectral regions. Here we study analytically, numerically and experimentally the scaling of soliton dynamics in noble gas-filled hollow-…
View article: Post-recombination effects in confined gases photoionized at megahertz repetition rates
Post-recombination effects in confined gases photoionized at megahertz repetition rates Open
Recombination-driven acoustic pulses and heating in a photoionized gas transiently alter its refractive index. Slow thermal dissipation can cause substantial heat accumulation and impair the performance and stability of gas-based laser sys…
View article: Sub-two-cycle octave-spanning mid-infrared fiber laser
Sub-two-cycle octave-spanning mid-infrared fiber laser Open
Compact and powerful ultrafast light sources at high pulse repetition rates, based on mode-locked near infrared fiber lasers, are now widely available and are being used in applications such as frequency metrology, molecular spectroscopy, …
View article: Efficient single-cycle pulse compression of an ytterbium fiber laser at 10 MHz repetition rate
Efficient single-cycle pulse compression of an ytterbium fiber laser at 10 MHz repetition rate Open
Over the past years, ultrafast lasers with average powers in the 100 W range have become a mature technology, with a multitude of applications in science and technology. Nonlinear temporal compression of these lasers to few- or even single…
View article: Supplementary document for Sub-two-cycle octave-spanning mid-infrared fiber laser - 4416854.pdf
Supplementary document for Sub-two-cycle octave-spanning mid-infrared fiber laser - 4416854.pdf Open
Supplemental document
View article: Pump-Probe Study of Plasma Dynamics in Gas-Filled Photonic Crystal Fiber Using Counterpropagating Solitons
Pump-Probe Study of Plasma Dynamics in Gas-Filled Photonic Crystal Fiber Using Counterpropagating Solitons Open
We present a pump-probe technique for monitoring ultrafast polarizability changes. In particular, we use it to measure the plasma density created at the temporal focus of a self-compressing higher-order pump soliton in gas-filled hollow-co…
View article: Carrier-envelope-phase-stable soliton-based pulse compression to 44 fs and ultraviolet generation at the 800 kHz repetition rate
Carrier-envelope-phase-stable soliton-based pulse compression to 44 fs and ultraviolet generation at the 800 kHz repetition rate Open
In this Letter, we report the generation of a femtosecond supercontinuum extending from the ultraviolet to the near-infrared spectrum and detection of its carrier-envelope-phase (CEP) variation by f-to-2f interferometry. The spectrum is ge…
View article: Generation of microjoule pulses in the deep ultraviolet at megahertz repetition rates
Generation of microjoule pulses in the deep ultraviolet at megahertz repetition rates Open
Although ultraviolet (UV) light is important in many areas of science and technology, there are very few if any lasers capable of delivering wavelength-tunable ultrashort UV pulses at MHz repetition rates. Here we report the generation of …
View article: Mid-infrared dispersive wave generation in gas-filled photonic crystal fibre by transient ionization-driven changes in dispersion
Mid-infrared dispersive wave generation in gas-filled photonic crystal fibre by transient ionization-driven changes in dispersion Open
Gas-filled hollow-core photonic crystal fibre is being used to generate ever wider supercontinuum spectra, in particular via dispersive wave emission in the deep and vacuum ultraviolet, with a multitude of applications. Dispersive waves ar…
View article: High average power and single-cycle pulses from a mid-IR optical parametric chirped pulse amplifier
High average power and single-cycle pulses from a mid-IR optical parametric chirped pulse amplifier Open
In attosecond and strong-field physics, the acquisition of data in an acceptable time demands the combination of high peak power with high average power. We report a 21 W mid-IR optical parametric chirped pulse amplifier (OPCPA) that gener…
View article: Soliton-effect self-compressed single-cycle 9.6-W mid-IR pulses from a 21-W OPCPA at 3.25 μm and 160 kHz
Soliton-effect self-compressed single-cycle 9.6-W mid-IR pulses from a 21-W OPCPA at 3.25 μm and 160 kHz Open
We report a 21-W mid-IR OPCPA that generates 131-μJ and 97 fs (sub-9-cycle) pulses at 160 kHz repetition rate and at a centre wavelength of 3.25 μm. Pulse-to-pulse stability of the CEP-stable output is excellent with 0.33% rms over 288 mil…
View article: Soliton-effect self-compressed single-cycle 9.6-W mid-IR pulses from a 21-W OPCPA at 3.25 {\mu}m and 160 kHz
Soliton-effect self-compressed single-cycle 9.6-W mid-IR pulses from a 21-W OPCPA at 3.25 {\mu}m and 160 kHz Open
We report a 21-W mid-IR OPCPA that generates 131-{\mu}J and 97 fs (sub-9-cycle) pulses at 160 kHz repetition rate and at a centre wavelength of 3.25 {\mu}m. Pulse-to-pulse stability of the CEP-stable output is excellent with 0.33% rms over…
View article: PHz-Wide Spectral Interference Through Coherent Plasma-Induced Fission of Higher-Order Solitons
PHz-Wide Spectral Interference Through Coherent Plasma-Induced Fission of Higher-Order Solitons Open
We identify a novel regime of soliton-plasma interactions in which high-intensity ultrashort pulses of intermediate soliton order undergo coherent plasma-induced fission. Experimental results obtained in gas-filled hollow-core photonic cry…