Brillouin mirror with inverted acoustic profile in presence of strong acoustic dispersion
| Autor: | Montes, Antonio, Montes, Carlos, Picholle, Éric |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya [Barcelona] (UPC), Institut de Physique de Nice (INPHYNI), Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Diffusion Brillouin stimulée
modèle à 3 ondes fibres microstructurées [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] superluminal Photonic crystal fiber [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Physics::Optics supraluminique dispersion Stimulated Brillouin scattering [NLIN]Nonlinear Sciences [physics] 3-wave model |
| Zdroj: | Journal of the Optical Society of America B Journal of the Optical Society of America B, Optical Society of America, In press |
| ISSN: | 0740-3224 1520-8540 |
| Popis: | International audience; While usually negligible in standard optical fibers, the group velocity dispersion of acoustic waves may in some cases play a significant role in the dynamics of stimulated Brillouin scattering (SBS) in propagation medias with more complex structures, such as microstructured fibers. The usual 3-wave coherent model of SBS can be adapted to take a perturbative acoustic dispersion into account, but the slowly varying envelopes approximation does not hold for stronger values of the acoustic dispersion, which call for a more sophisticated inertial model of SBS. A new regime of SBS mirror with a spatially inverted acoustic profile is predicted in this limit. In presence of strong acoustic dispersion, this regime exhibits a higher conversion efficiency than the usual mirror in the dispersionless case, as well as nonlinear self-stabilization of the phase of the acoustic wave when the pump is strongly depleted. Formal calculations allow the identification of regions of strong dynamic dispersion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|