Theoretical analysis of continuous-wave Raman gain/lasing in silicon wire waveguides without carrier extraction scheme

Abstract

Stimulated Raman scattering in silicon waveguides are attractive for optical amplification/lasing due to high Raman coefficient and high optical pump intensity in the small waveguide core. In this paper, we investigate the effect of two-photon absorption and free-carrier absorption for continuous-wave light propagation in submicron size silicon wire waveguides. We also show that if the waveguide lengths and pump powers are optimized, the net continuous-wave Raman gain and thus lasing activities in such waveguides without any additional free carrier extraction schemes is possible. © 2005, The Institute of Electronics, Information and Communication Engineers. All rights reserved.