Supercontinuum generation and four wave mixing in Ge11As22Se67 rib waveguides with a nonlinear parameter ≫26000W−1km−1

Here we describe our first results using a new waveguide material: Ge₁₁As₂₂Se₆₇ whose nonlinearity is about 4 times larger than As₂S₃ and which has allowed us to achieve nonlinear parameters in air-clad rib waveguides in excess of 26000 W^-1km^-1. Rib waveguides were fabricated by dry etching 340 nm deep into 680 nm thick glass films deposited by thermal evaporation onto an oxidized silicon wafer. This enhanced nonlinear response along with dispersion control leads to strong effects such as supercontinuum generation and broad-band four wave mixing with large gain using pulses with peak powers of 10-30 W. The nonlinear response is also sufficient to allow nonlinear processing using CW powers in the 100 mW range. This talk will describe the properties of Ge₁₁As₂₂Se₆₇ waveguides and their nonlinear properties at telecommunications wavelengths.