We consider the propagation of a partially coherent spatial beam in both self-focusing and self-defocusing nonlinear media. Using a Gaussian–Schell model, we derive an equation governing the width of highly incoherent beams as they propagate in both types of media and confirm its validity by using numerical simulations. Experiments performed in a biased photorefractive crystal match the predicted scaling.
© 2009 Optical Society of America
Original Manuscript: March 5, 2009
Revised Manuscript: June 25, 2009
Manuscript Accepted: July 9, 2009
Published: September 29, 2009
Can Sun, Dmitry V. Dylov, and Jason W. Fleischer, "Nonlinear focusing and defocusing of partially coherent spatial beams," Opt. Lett. 34, 3003-3005 (2009)