Phase-matched parametric four-wave mixing in higher-order guided modes of a photonic crystal fiber is shown to result in an efficient decay of 40-fs 800-nm Ti:sapphire laser pump pulses into an anti-Stokes signal with a central wavelength around 590–600 nm and a Stokes signal centered at 1.25 μm . The photonic crystal fiber is designed in such a way as to minimize the group-velocity dispersion at the pump wavelength, phase match the parametric four-wave-mixing process, and reduce the group delay between the pump and the anti-Stokes pulses. The duration of the anti-Stokes pulse under these conditions, as shown by cross-correlation frequency-resolved optical gating measurements, is less than 200 fs.
© 2004 Optical Society of America
S. O. Konorov, E. E. Serebryannikov, A. M. Zheltikov, Ping Zhou, A. P. Tarasevitch, and D. von der Linde, "Generation of femtosecond anti-Stokes pulses through phase-matched parametric four-wave mixing in a photonic crystal fiber," Opt. Lett. 29, 1545-1547 (2004)