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Photonic integrated circuits (PICs) are a key component [1] for futuretelecommunication networks, where demands for greater bandwidth, networkflexibility, low energy consumption and cost must all be met. The quest for alloptical components has naturally targeted materials with extremely largenonlinearity, including chalcogenide glasses (ChG) [2] and semiconductors, suchas silicon [3] and AlGaAs [4]. Yet issues such as immature fabricationtechnologies for ChG, and high linear and nonlinear losses for semiconductors,motivate the search for other materials. Here we present the firstdemonstration of nonlinear optics in integrated silica based glass waveguidesusing continuous wave (CW) light. We demonstrate four wave mixing (FWM), withlow (7mW) CW pump power at a wavelength of 1550nm, in high index doped silicaglass ring resonators capable of performing in photonic telecommunicationsnetworks as linear filters [5]. The high reliability, design flexibility, andmanufacturability of our device raises the possibility of a new platform forfuture low cost nonlinear all optical PICs.

1 Low power continuous-wave nonlinear optics in silica glass integrated waveguide structures