Intermodal four-wave mixing from femtosecond pulse-pumped photonic crystal fiber.
Large Stokes-shift ( approximately 4700 cm(-1)) four-wave mixing is generated in a deeply normal dispersion regime from a 20 cm commercial large-mode-area photonic crystal fiber pumped by amplified approximately 800 nm femtosecond pulses. The phase-matching condition is realized through an intermodal scheme involving two pump photons in the fundamental fiber mode and a pair of Stokesanti-Stokes photons in a higher-order fiber mode. Over 7% conversion efficiency from the pump input to 586 nm anti-Stokes signal has been attained.
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Biophotonics Imaging Laboratory, Beckman Institute for Advanced Science and Technology,University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Jiang
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Marks
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Boppart
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