Unprecedented Raman cascading and four-wave mixing from second-harmonic generation in optical fiber.
We experimentally demonstrate strong second-harmonic-generation from a self-induced all-optical poling in germanium-doped fiber with a subnanosecond laser pump at 1064 nm. The large second-harmonic conversion efficiency allows nonlinear spectral broadening at visible wavelengths so that up to nine distinct Raman sidebands have been obtained. In this work we emphasize how the Raman scattering, induced from the pump in the IR region, can drastically affect the optical poling effect, limiting in turn second-harmonic generation.
Couderc
Vincent
V
XLIM Research Institute-UMR CNRS 6172, Faculté des Sciences et Techniques, Université de Limoges,87060 Limoges, France. vincent.couderc@xlim.fr
Tonello
Alessandro
A
Buy-Lesvigne
Christelle
C
Leproux
Philippe
P
Grossard
Ludovic
L