#### Filter Results:

- Full text PDF available (8)

#### Publication Year

1999

2017

- This year (4)
- Last 5 years (20)
- Last 10 years (28)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

- Carsten Bree, Jens Bethge, Stefan Skupin, Luc Berge, Ayhan Demircan, Gunter Steinmeyer
- CLEO/QELS: 2010 Laser Science to Photonic…
- 2010

We discuss pulse-splitting-isolation cycles as the origin of pulse self-compression in filaments. These cycles can be cascaded in a single gas-filled cell, giving rise to tenfold compression. XFROG spectrograms provide experimental evidence for double self-compression.

- A Demircan, Sh Amiranashvili, G Steinmeyer
- Physical review letters
- 2011

A novel concept for an all-optical transistor is proposed and verified numerically. This concept relies on cross-phase modulation between a signal and a control pulse. Other than previous approaches, the interaction length is extended by temporally locking control and the signal pulse in an optical event horizon, enabling continuous modification of the… (More)

- C. Bree, A. Demircan, G. Steinmeyer
- CLEO: 2011 - Laser Science to Photonic…
- 2011

A Kramers-Kronig transform of multiphoton ionization rates allows for a computation of the spectrally dependent nonlinear refractive index change and predicts its intensity dependent saturation and inversion in remarkable agreement with recent experimental results.

- A. Demircan, U. Bandelow
- NUSOD '05. Proceedings of the 5th International…
- 2005

We report on a numerical study of supercontinuum generation in a single-mode optical fiber. We show that the modulation instability (MI) can be responsible for the generation of ultrabroadband octave-spanning continua for pico- and subpicosecond pulses in the anomalous- as well as in the normal dispersion region. The MI turns out to dominate higher-order… (More)

- Ayhan Demircan, Shalva Amiranashvili, Carsten Brée, Christoph Mahnke, Fedor Mitschke, Günter Steinmeyer
- Scientific reports
- 2012

The concept of rogue waves arises from a mysterious and potentially calamitous phenomenon of oceanic surfaces. There is mounting evidence that they are actually commonplace in a variety of different physical settings. A set of defining criteria has been advanced; this set is of great generality and therefore applicable to a wide class of systems. The… (More)

- Simon Birkholz, Erik T J Nibbering, +4 authors Günter Steinmeyer
- Physical review letters
- 2013

The transient appearance of bright spots in the beam profile of optical filaments formed in xenon is experimentally investigated. Fluence profiles are recorded with high-speed optical cameras at the kilohertz repetition rate of the laser source. A statistical analysis reveals a thresholdlike appearance of heavy-tailed fluence distributions together with the… (More)

- Bastian Borchers, Carsten Brée, Simon Birkholz, Ayhan Demircan, Günter Steinmeyer
- Optics letters
- 2012

We discuss the influence of the higher-order Kerr effect (HOKE) in wide bandgap solids at extreme intensities below the onset of optically induced damage. Using different theoretical models, we employ multiphoton absorption rates to compute the nonlinear refractive index by a Kramers-Kronig transform. Within this theoretical framework we provide an estimate… (More)

- Simon Birkholz, Carsten Brée, Ivan Veselić, Ayhan Demircan, Günter Steinmeyer
- Scientific reports
- 2016

We reanalyse the probability for formation of extreme waves using the simple model of linear interference of a finite number of elementary waves with fixed amplitude and random phase fluctuations. Under these model assumptions no rogue waves appear when less than 10 elementary waves interfere with each other. Above this threshold rogue wave formation… (More)

- Welm M Pätzold, Carsten Reinhardt, Ayhan Demircan, Uwe Morgner
- Optics letters
- 2016

Waveguide writing in poly (methyl methacrylate) (PMMA) with femtosecond laser radiation is presented. An adequate refractive index change is induced in the border area below the irradiated focal volume. It supports an almost symmetric fundamental mode with propagation losses down to 0.5 dB/cm, the lowest losses observed so far in this class of materials.… (More)

- A Demircan, S Scheel, N Seehafer
- 1999

We investigate numerically the appearance of heteroclinic behavior in a three-dimensional, buoyancy-driven uid layer with stress-free top and bottom boundaries, a square horizontal periodicity with a small aspect ratio, and rotation at low to moderate rates about a vertical axis. The Prandtl number is 6:8. If the rotation is not too slow, the… (More)