info:eu-repo/semantics/article
Anti-Stokes Raman gain enabled by modulation instability in mid-IR waveguides
Fecha
2018-11Registro en:
Sánchez, Alfredo Daniel; Fierens, Pablo Ignacio; Hernandez, Santiago Martin; Bonetti, Juan Ignacio; Brambilla, G.; et al.; Anti-Stokes Raman gain enabled by modulation instability in mid-IR waveguides; Optical Society of America; Journal of the Optical Society of America B-Optical Physics; 35; 11; 11-2018; 2828-2832
0740-3224
CONICET Digital
CONICET
Autor
Sánchez, Alfredo Daniel
Fierens, Pablo Ignacio
Hernandez, Santiago Martin
Bonetti, Juan Ignacio
Brambilla, G.
Grosz, Diego Fernando
Resumen
The inclusion of self-steepening in the linear stability analysis of modulation instability (MI) leads to a powercutoff above which the MI gain vanishes. Under these conditions, MI in mid-IR waveguides is shown to give riseto the usual double-sideband spectrum, but with Raman-shaped sidelobes. This results from the energy transfer ofa continuous-wave laser simultaneously to both Stokes and anti-Stokes bands in pseudo-parametric fashion. Assuch, the anti-Stokes gain matches completely the Stokes profile over the entire gain bandwidth. This remarkablebehavior, not expected from an unexcited medium, is shown not to follow from a conventional four-wave mixinginteraction between the pump and the Stokes band. We believe this observation to be of relevance in the area ofRaman-based sensors, which, in several instances, rely on monitoring small power variations of the anti-Stokesspectral component.