Asymmetric spectrum evolution of high power short pulses in AlGaAs waveguides

Modotto, D. et al. (2005) Asymmetric spectrum evolution of high power short pulses in AlGaAs waveguides. Optics Communications, 249(1-3), pp. 201-208. (doi: 10.1016/j.optcom.2005.01.023)

Abstract

We measured the self-phase modulation spectra at the output of deep-etched AlGaAs waveguides. The light source was an OPO laser system providing 250 fs long pulses, at wavelengths around 1520 nm, with a peak power as high as 1 kW. FROG measurements of the OPO pulses reveal their asymmetric shape. The multi-peak spectra, observed at the waveguide output, show a dramatic asymmetry and a power shift towards short wavelengths. The interplay between the Kerr non-linearity, dispersion and self-steepening amplifies the initial slight asymmetry of the injected spectrum. Experimental results compare favourably with the numerical solution of the generalized non-linear Schrödinger equation.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Stanley, Professor Colin
• Authors: Modotto, D., Mondia, J.P., Linden, S., Tan, H.W., Morandotti, R., Kleckner, T.C., Locatelli, A., De Angelis, C., van Driel, H.M., Stanley, C.R., and Aitchison, J.S.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering; University Centres > Glasgow Materials Research Initiative
• Journal Name: Optics Communications
• ISSN: 0030-4018