Effects of two-photon absorption on degenerate four-wave mixing in solutions of diphenyl polyenes.
We have observed double-peaked phase-conjugate pulses in the degenerate four-wave mixing of nanosecond laser pulses in solutions of diphenyl polyenes. We attribute this to the superposition of fast and slow gratings, where the slow grating is due to two-photon absorption. This is supported by the results of time delay and polarization experiments as well as evidence of a second spatial harmonic grating.
Fleitz
P A
PA
Sutherland
R L
RL
Natarajan
L V
LV
Pottenger
T
T
Fernelius
N C
NC