Two dimensional counterpropagating spatial solitons in photorefractive crystals.
We demonstrate experimentally the existence of two transverse-dimensional counterpropagating (CP) incoherent spatial solitons in a 5 x 5 x 23 mm SBN:60Ce photorefractive crystal and investigate their dynamical behavior. We carry out numerical simulations that confirm our experimental findings. Substantially different behavior from the copropagating incoherent solitons is found. A symmetry breaking transition from stable overlapping CP solitons to unstable transversely displaced CP solitons is observed. We perform linear stability analysis that predicts the threshold for the split-up transition, in qualitative agreement with numerical simulations and experimental results.
Petrović
M
M
Institute of Physics, Post Office Box 57, 11001 Belgrade, Serbia.
Jović
D
D
Belić
M
M
Schröder
J
J
Jander
Ph
P
Denz
C
C