Threshold analysis for transverse instabilities in photorefractive counterpropagating two-wave mixing through reflection gratings is performed. A numerical algorithm for the treatment of wave equations in this geometry is developed, displaying the emergence of running transverse waves. They appear above a threshold in the applied electric field, and their transverse wave number and oscillation frequency agree well with the values predicted by stability analysis.
© 1997 Optical Society of America
[of America ]
O. Sandfuchs, J. Leonardy, F. Kaiser, and M. R. Belić, "Transverse instabilities in photorefractive counterpropagating two-wave mixing," Opt. Lett. 22, 498-500 (1997)