Bétourné A, Quiquempois Y, Bouwmans G, Douay M
Université des Sciences et Technologies de Lille, Laboratoire de Physique des Lasers, Atomes et Molécules UMR8523, 8Villeneuve dAscq Cedex, France.
Opt Express. 2008 Sep 1;16(18):14255-62. doi: 10.1364/oe.16.014255.
We report on a possible phase matching between two fundamental modes guided in an appropriately designed photonic crystal fiber. The phase index matching condition can be perfectly fulfilled for second or third harmonic generation and for wavelengths over a large spectral range, simply by tuning the lattice pitch. This can be achieved in such a structure thanks to the coexistence of total internal reflection and photonic bandgap guidance, leading to two different dispersive behaviours for the fundamental and the harmonic waves.
