Journal
OPTICS LETTERS
Volume 40, Issue 12, Pages 2778-2781Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.40.002778
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- Air Force Office of Scientific Research (AFOSR) [FA9550-12-1-0377]
- Defense Advanced Research Projects Agency (DARPA) (PULSE Program)
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We investigate theoretically the parametric frequency comb generation in silicon microresonators at telecom and mid-infrared (MIR) wavelengths in the presence of multiphoton absorption and free-carrier effects using a modified Lugiato-Lefever model. We show that parametric oscillation may occur at MIR wavelengths, provided that the free-carrier lifetime is sufficiently short or the optical pump power is sufficiently low, but is inhibited at telecom wavelengths. In addition, we propose an etchless, air-clad silicon microresonator that enables an octave-spanning frequency comb in a completely passive device. (C) 2015 Optical Society of America
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