Second-harmonic generation (SHG) of ultra-short pulses can act as a prototypical nonlocal nonlinear model, since the strength and nature of the temporal nonlocality can be controlled through the phase-mismatch parameter. The presence of a group-velocity mismatch namely implies that when the phase mismatch is small the nonlocal response function becomes oscillatory, while for large phase mismatch it becomes localized. In the transition between the two regimes the strength of the nonlocality diverges, and the system goes from a weakly nonlocal to a strongly nonlocal state. When simulating soliton compression to few-cycle pulses in the cascaded quadratic soliton compressor, the spectral content of the full coupled SHG model is predicted by the nonlocal model even when few-cycle pulses are interacting.
|Title of host publication||First Mediterrenean Photonics Conference|
|Editors||A. Cutolo, M. N. Armenise, R. Ramponi|
|Place of Publication||Italy|
|Publisher||Edizioni Giorgio Lieto|
|Publication status||Published - 2008|
|Event||First Mediterrenean Photonics Conference - Italy|
Duration: 1 Jan 2008 → …
Conference number: 1
|Conference||First Mediterrenean Photonics Conference|
|Period||01/01/2008 → …|
Bache, M., Bang, O., Krolikowski, W., Moses, J., & Wise, F. W. (2008). Controllable nonlocal behaviour by cascaded second-harmonic generation of fs pulses. In A. Cutolo, M. N. Armenise, & R. Ramponi (Eds.), First Mediterrenean Photonics Conference (pp. 197-199). Edizioni Giorgio Lieto.