Design of Efficient Photonic Coupler Structures for Lumped Raman Amplification in Silicon Waveguides

New design for silicon based integrable coupler/ pump-combiner is presented in the paper. The pump- combiner is designed with the view of efficient stimulated Raman scattering/Raman amplification in silicon waveguides. Performances of some couplers with well-known structure are also analyzed in this work. Analysis of the new coupler shows significant improvement in the transmittance performance compared with the well-known structures, discussed in the work.