We illustrate the results on the investigation of second harmonic generation (SHG) in planar nonlinear waveguides assisted by a Bragg grating, along the propagation direction, reproducing a photonic-bandgap (PBG) structure. The analysis is performed in time domain by using a home-made finite difference time domain (FDTD) computer code that exploits the auxiliary differential equations (ADE) scheme, in order to take into account the dispersion effect. As it is known, by tuning the signal at fundamental wavelength at the band edge the density of optical modes is enhanced, allowing the group velocity decrease and a strong localization of the energy inside the nonlinear structure, being the conversion efficiency of the SHG process drastically increased.
|Titolo:||Second order nonlinear interactions in periodic waveguides|
|Titolo del libro:||Proceedings of 2004 6th International Conference on Transparent Optical Networks|
|Data di pubblicazione:||2004|
|Digital Object Identifier (DOI):||10.1109/ICTON.2004.1360259|
|Appare nelle tipologie:||2.1 Contributo in volume (Capitolo o Saggio)|