Determination of nonlinear refractive index in a Ta2O 5 rib waveguide using self-phase modulation

Chao Yi Tai, James S. Wilkinson, Nicolas M.B. Perney, M. Caterina Netti, F. Cattaneo, Chris E. Finlayson, Jeremy J. Baumberg

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

Self-phase modulation has been observed for ultrashort pulses of wavelength 800nm propagating through a 1 cm-long Ta2O5 rib waveguide. The associated nonlinear refractive index n2 was estimated to be 7.23×10-19 m2/W, which is higher than silica glass by more than one order of magnitude. Femtosecond time of flight measurements based on a Kerr shutter configuration show that the group velocity dispersion is small at a wavelength of 800 nm, confirming that dispersion may be neglected in the estimation of n2 so that a simplified theory can be used with good accuracy.

Original languageEnglish
Pages (from-to)5110-5116
Number of pages7
JournalOptics Express
Volume12
Issue number21
DOIs
StatePublished - Oct 2004

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