Abstract
We study Raman amplification in cascaded microring resonator structures and the scaling of conversion efficiency with respect to parameters such as bandwidth, free spectral range, and number of resonators. We also compare the efficiency of cascaded resonator structures to that of standard waveguides of equivalent group delay, where improvement of more than 1 order of magnitude is obtained in a more compact structure. In these studies, we use linear and nonlinear parameters relevant to silica and silicon integrated optics and include effects due to the two-photon absorption and the generation of free carriers.
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