Efficient anti-Stokes generation through phase-matched four-wave mixing in higher-order modes of a microstructure fiber.
Phase-matched four-wave mixing in higher-order modes of microstructure fibers allows unprecedentedly high efficiencies of anti-Stokes frequency conversion to be achieved for subnanojoule femtosecond laser pulses. 70-fs pulses of 790-nm radiation were used to generate an anti-Stokes component at 520-530 nm in a higher-order mode of a microstructure fiber with a 4.8-microm core. The maximum ratio of the anti-Stokes signal energy to the energy of the pump component in the output spectrum is estimated as 1.7.
Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, 119899 Moscow, Russia.
D A
DA
Akimov
E E
EE
Serebryannikov
A M
AM
Zheltikov
M
M
Schmitt
R
R
Maksimenka
W
W
Kiefer
K V
KV
Dukel'skii
V S
VS
Shevandin
Yu N
YN
Kondrat'ev