The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Filamentation in different multi-photon absorption regimes was studied using different laser wavelengths in a zinc selenide crystal. The 3-photon ionization/absorption threshold was verified, and the impact of absorption on filament formation was observed.
We report the coherent spectral broadening of a mode-locked VECSEL in normal-dispersion photonic crystal fibers. Subsequent compression produced 150 fs pulses at 270 mW average power or 220 fs pulses at 520 mW average power.
We report a novel two state behavior in the Modulational Instability (MI) induced Supercontinuum Generation (SCG) in the exponential saturable nonlinearity (ESN). We identified the unique behavior of SCG in the ESN system, unlike the case of Kerr type nonlinearity, where the nonlinearity monotonously increases with power, in the case ESN, the effective nonlinearity follows in a unique such that there...
We design a silicon nanowire embedded spiral photonic crystal fiber exhibiting a flattened, anomalous with small third order dispersion and a high nonlinearity and demonstrate supercontinuum spectrum of 500 nm bandwidth at 0.450 µm wavelength.
We propose a simple approach to control the supercontinuum generation, where a minute fraction of the output at specific positions was selected using a narrowband filter and then fed into a highly nonlinear fibre as the seeding light. We numerically investigated the influence of the feedback component on the supercontinuum generation. The results show the supercontinuum can be significantly enhanced...
The fission of N-solitons fission is a key mechanism leading to supercontinuum generation and creation of ultra-compressed pulses and solitons featuring strong frequency tuning [1-3]. Surprisingly, the mechanism per se was not studied in detail, beyond the approach treating higher-order dispersive and nonlinear terms as small perturbations to the nonlinear Schrödinger equation (NLS) [4]. This approach...
This work addresses the effect of trapping of quasi-linear dispersive waves between optical solitons propagating in fibers with the high-order dispersion. It is shown that the four-wave mixing between the solitons and the dispersive waves can lead to nearly perfect reflection of the quasi-linear waves from the solitons [1]. Consequently, solitons can play a role of mirrors for the waves, thus forming...
Fiber supercontinuum (SC) generation is a well-known process widely studied over the last decade [1]. Recently, the particular case of noise-driven SC has received increasing attention because of novel instability properties and links with other systems in the formation of extreme events [2]. SC fluctuations have been investigated experimentally typically through RF measurements technique [3] or considering...
The fission of N-solitons is a key mechanism leading to the supercontinuum generation and creation of hyper-compressed pulses and solitons featuring strong wavelength tuning [1, 2]. Recent advances in manufacturing PCFs filled with Raman-inactive gases [3] provide a strong motivation to focus the studies on the fission driven by the third-order dispersion (TOD) [4], and potential applications of this...
Diamond is known from its strong single and narrow Raman line at 1332 cm−1. Our goal was to examine if the Raman response will noticeable influence the process of supercontinuum generation in diamond. We thus study experimentally the spectrum of the supercontinuum generated in a bulk diamond crystal as a function of the input energy. The 1 kHz regenerative amplifier was used as a source for 800 nm...
The noise properties of supercontinuum generation continue to be a subject of wide interest within both pure and applied physics. Aside from immediate applications in supercontinuum source development, detailed studies of supercontinuum noise mechanisms have attracted interdisciplinary attention because of links with extreme instabilities in other physical systems, especially the infamous and destructive...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.