Conference paper
Designing quadratic nonlinear photonic crystal fibers for soliton compression to few-cycle pulses
Second-harmonic generation (SHG) in the limit of large phase mismatch, given by Deltabeta=beta2-2beta1 effectively induces a Kerr-like nonlinear phase shift on the fundamental wave (FW). The phase mismatch determines the sign and magnitude of the effective Kerr nonlinearity, making large negative phase shifts accessible.
This self-defocusing nonlinearity can be used to compress a pulse when combined with normal dispersion, and problems normally encountered due to self-focusing in cubic media are avoided. Thus, having no power limit, in bulk media a self-defocusing soliton compressor can create high-energy near single-cycle fs pulses (Liu et al., 2006).
However, the group-velocity mismatch (GVM) between the FW and second harmonic (SH), given by the inverse group velocity difference d12=1/Vg,1 - 1/Vg,2, limits the pulse quality and compression ratio. Especially very short input pulses (
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2007 |
| Pages: | 1-1 |
| Proceedings: | Conference on Lasers and Electro-Optics and International Quantum Electronics Conference 2007 |
| ISBN: | 1424409306 , 1424409314 , 9781424409303 , 9781424409310 , 150908648X , 150908648x and 9781509086481 |
| Types: | Conference paper |
| DOI: | 10.1109/CLEOE-IQEC.2007.4386534 |
| ORCIDs: | Bache, Morten , Lægsgaard, Jesper and Bang, Ole |
Geometrical optics Gratings Optical pulses Optical waveguides Photonic crystal fibers Physics Predictive models Pulse compression methods Silicon compounds Solitons cascaded quadratic soliton compression few-cycle pulse group-velocity mismatch optical harmonic generation optical pulse compression optical solitons photonic crystals quadratic nonlinear photonic crystal fiber second-harmonic generation thermally-poled silica photonic crystal fiber uniformly compressed beam waveguided geometry
