| Autor: |
Porcel MA, Schepers F, Epping JP, Hellwig T, Hoekman M, Heideman RG, van der Slot PJ, Lee CJ, Schmidt R, Bratschitsch R, Fallnich C, Boller KJ |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2017 Jan 23; Vol. 25 (2), pp. 1542-1554. |
| DOI: |
10.1364/OE.25.001542 |
| Abstrakt: |
We demonstrate supercontinuum generation in stoichiometric silicon nitride (Si 3 N 4 in SiO 2 ) integrated optical waveguides, pumped at telecommunication wavelengths. The pump laser is a mode-locked erbium fiber laser at a wavelength of 1.56 µm with a pulse duration of 120 fs. With a waveguide-internal pulse energy of 1.4 nJ and a waveguide with 1.0 µm × 0.9 µm cross section, designed for anomalous dispersion across the 1500 nm telecommunication range, the output spectrum extends from the visible, at around 526 nm, up to the mid-infrared, at least to 2.6 µm, the instrumental limit of our detection. This output spans more than 2.2 octaves (454 THz at the -30 dB level). The measured output spectra agree well with theoretical modeling based on the generalized nonlinear Schrödinger equation. The infrared part of the supercontinuum spectra shifts progressively towards the mid-infrared, well beyond 2.6 µm, by increasing the width of the waveguides. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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