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.
Inspec keywords: Raman lasers; spectroscopic light sources; silicon; infrared sources; optical pumping; solid lasers; waveguide lasers; numerical analysis
Other keywords:
Subjects: Design of specific laser systems; Solid lasers; Other numerical methods; Numerical approximation and analysis; Lasing action in other solids
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