All-optically tunable waveform synthesis by a silicon nanowaveguide ring resonator coupled with a photonic-crystal fiber frequency shifter
AuthorsSavvin, Aleksandr D.
Fedotov, Il'ya V.
Fedotov, Andrei B.
Perova, Tatiana S.
Zheltikov, Aleksei M.
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AbstractA silicon nanowaveguide ring resonator is combined with a photonic-crystal fiber (PCF) frequency shifter to demonstrate an all-optically tunable synthesis of ultrashort pulse trains, modulated by ultrafast photoinduced free-carrier generation in the silicon resonator. Pump-probe measurements performed with a 50-fs, 625-nm second-harmonic output of a Cr:forsterite laser, used as a carrier-injecting pump, and a 1.50-1.56-μm frequency-tunable 100-fs soliton output of a photonic-crystal fiber, serving as a probe, resolve tunable ultrafast oscillatory features in the silicon nanowaveguide resonator response. © 2010 Elsevier B.V. All rights reserved.
SponsorsThis work was partially supported by the Russian Federal Science and Technology Program (contract nos. 1130 and 02.740.11.0223), the Russian Foundation for Basic Research (projects 08-02-92226, 10-02-91173, 09-02-12373, 09-02-12359, and 09-02-92119), and the Science Foundation Ireland National Access Programme (NAP 168).