Phase-matching conditions for nonlinear frequency conversion by use of aligned molecular gases.
Transient birefringence can be induced in a gas of anisotropic molecules by an intense polarized laser pulse. We propose to use this birefringence to phase match nonlinear optical frequency-conversion processes. The conditions for anisotropic phase matching are derived, and experimental conditions required for phase-matched third-harmonic generation in a gas-filled hollow-core fiber are presented. We show that these conditions are experimentally feasible over a significant parameter range, making possible a new type of nonlinear optics.
Bartels
R A
RA
JILA and the Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA. bartels@colorado.edu
Wagner
N L
NL
Baertschy
M D
MD
Wyss
J
J
Murnane
M M
MM
Kapteyn
H C
HC