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.
Akimov
D A
DA
Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, 119899 Moscow, Russia.
Serebryannikov
E E
EE
Zheltikov
A M
AM
Schmitt
M
M
Maksimenka
R
R
Kiefer
W
W
Dukel'skii
K V
KV
Shevandin
V S
VS
Kondrat'ev
Yu N
YN