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Opt Lett. 2003 Aug 15;28(16):1448-50.

Enhanced four-wave mixing in a hollow-core photonic-crystal fiber.

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  • 1Department of Physics, International Laser Center, M. V. Lomonosov Moscow State University, 119899 Moscow, Russia.

Abstract

Hollow-core photonic-crystal fibers are shown to substantially enhance four-wave mixing (FWM) of laser pulses in a gas filling the fiber core. Picosecond pulses of Nd:YAG fundamental radiation and its second harmonic are used to generate a signal at the frequency of the third harmonic by the FWM process 3omega = 2omega + 2omega - omega. The efficiency achieved for this process in a 9-cm-long, 13-microm-hollow-core-diameter photonic-crystal fiber, designed to simultaneously transmit a two-color pump and the FWM signal, is shown to be approximately 800 times higher than the maximum FWM efficiency attainable with the same laser pulses in the tight-focusing regime.

PMID:
12943087
[PubMed]
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