
based on Raman amplification as shown in Figure 11.40 [76]. Because the gain
bandwidth typically captures only a mode or two of a multi-longitudinal mode laser,
such structures are typically driven with a high-power single-mode laser which could
have been modulated in the first place rather than frequency-converted. Nevertheless,
Raman amplification may be useful for boosting signals, generating light in new
wavelength regimes, or generating light with particular spectral characteristics.
Additional recent work has shown that the enhancement of the Kerr nonlinear-
ity, due to the high intensities encountered in silicon photonic waveguides, can
enable ...