Regensburg 2007 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 2: Internal Symposium “Nonlinearities of Photonic Materials”

DF 2.7: Talk

Monday, March 26, 2007, 12:20–12:40, H11

Bound soliton pairs in photonic crystal fiber — •Przemyslaw Szarniak, Alexander Podlipensky, Nicolas Joly, Chris Poulton, and Philip Russell — Max-Planck Research Group (IOIP), University of Erlangen-Nuremberg, Guenther-Scharowsky Str. 1/Bau 24, 91058 Erlangen, Germany

We demonstrate experimentally, for the first time to our knowledge, the formation of bound pairs of solitons in highly nonlinear PCF. The pairs are generated by break-up of higher order solitons, and each member of each pair experiences a different soliton self-frequency shift (SSFS), leading to a decrease in the temporal and spectral spacing between the soliton pair as the input power increases. This eventually results in the formation of a trapped pair of solitons when the spacing becomes sufficiently small. We observe that the trapped soliton pair continues to propagate along the PCF with constant frequency spacing and time delay, while the central frequency of the pair shifts to lower frequencies due to the SSFS. We also present the results of numerical calculations that confirm the experimental observations.