Answers are grounded in this paper and cite their sources.
It is shown by numerical simulations that cascaded silicon Raman lasers, in which the pump light undergoes multiple Stokes shifts in a silicon waveguide, can efficiently convert near-IR to mid-IR radiation. For pump wavelengths significantly below 2 µm, two-photon-absorption-induced free-carrier absorption degrades conversion efficiency, and the effective carrier lifetime determines the shortest possible pump wavelength.
No takes yet. Share an insight, caveat, or question.
Krause et al. (2006) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: