Abstract

The degenerate four-wave-mixing (DFWM) effect in Si quantum dot doped SiN_x (SiN_x:Si-QD) channel waveguide has been preliminarily demonstrated. By enhancing the optical nonlinearity of SiN_x at 1550 nm with doped Si-QDs, the DFWM can be enhanced with its conversion efficiency of −46 dB in the SiN_x:Si-QD channel waveguide with length of 8 mm. The nonlinear refractive index of the SiN_x:Si-QD is estimated to be $\rm{3 \times 10}^{-14}\rm{ cm}^{2}\rm{/ W}$ . The chromatic dispersion analysis indicates that the SiN_x:Si-QD channel waveguide exhibits 3-dB conversion bandwidth of larger than 16 nm. Such a SiN_x:Si-QD waveguide is free of multi-photon absorption at 1550 nm even when injecting an intense laser pulse as large as 1.3 GW/cm². These results show great potential of Si-QD doped SiN_x waveguide for nonlinear optical processing.

© 2016 IEEE

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