Tuning the frequency of ultrashort laser pulses by a cross-phase-modulation-induced shift in a photonic crystal fiber |
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Authors: | Konorov S O Akimov D A Zheltikov A M Ivanov A A Alfimov M V Scalora M |
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Institution: | Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Vorob'evy gory, Moscow 119899, Russia. |
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Abstract: | Femtosecond pulses of fundamental Cr:forsterite laser radiation are used as a pump field to tune the frequency of copropagating second-harmonic pulses of the same laser through cross-phase modulation in a photonic crystal fiber. Sub-100-kW femtosecond pump pulses coupled into a photonic crystal fiber with an appropriate dispersion profile can shift the central frequency of the probe field by more than 100 nm, suggesting a convenient way to control propagation and spectral transformations of ultrashort laser pulses. |
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