Spectral interference of frequency-shifted solitons in a photonic-crystal fiber.
Frequency-shifted solitons in a highly nonlinear photonic-crystal fiber (PCF) are shown to give rise to high-visibility interference fringes in PCF output spectra, indicating flat spectral phase profiles of individual solitons in the PCF output. This experimental finding, supported by numerical simulations, suggests a promising method of fiber-format pulse shaping and an attractive technology for few-cycle pulse synthesis through a coherent addition of frequency-shifted solitons generated in a highly nonlinear fiber.
Voronin
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Physics Department, M.V. Lomonosov Moscow State University, Vorob'evy gory, Moscow, Russia.
Fedotov
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IV
Fedotov
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Zheltikov
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AM