Abstract
We observe for the first time net continuous wave optical gain in a low loss silicon-on-insulator waveguide based on stimulated Raman scattering. We show that nonlinear optical loss due to two-photon absorption induced free carrier absorption can be significantly reduced by introducing a reverse biased p-i-n diode in the waveguide. For a 4.8 cm long waveguide with an effective core area of ~1.6 µm2, we obtain a net CW Raman gain of >3dB with a pump power of ~700mW inside the waveguide.
©2005 Optical Society of America
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