Tunable group delay in a SOI waveguide based on stimulated Raman scattering

We analytically demonstrate the slow down factor enhancement of slow light induced by stimulated Raman scattering in a silicon-on insulator waveguide with a p-i-n Structure. An analytical model is derived for group delay simulation by taking into account of propagation loss and free carrier absorption. It is shown that applying a variable reverse bias voltage to the waveguide decreases the FCA and thus the maximum group delay can be enhanced. Tunable delay time is achievable through applying different bias voltages.