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Dispersive-wave-based octave-spanning supercontinuum generation in InGaP membrane waveguides on a silicon substrate

Utsav D. Dave, Charles Ciret, Simon-Pierre Gorza, Sylvain Combrie, Alfredo De Rossi, Fabrice Raineri, Gunther Roelkens, and Bart Kuyken

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Abstract

We demonstrate the generation of an octave-spanning supercontinuum in InGaP membrane waveguides on a silicon substrate pumped by a 1550-nm femtosecond source. The broadband nature of the supercontinuum in these dispersion-engineered high-index-contrast waveguides is enabled by dispersive wave generation on both sides of the pump as well as by the low nonlinear losses inherent to the material. We also measure the coherence properties of the output spectra close to the pump wavelength and find that the supercontinuum is highly coherent at least in this wavelength range.

© 2015 Optical Society of America

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