We demonstrate theoretically and experimentally that induced spatiotemporal modulation instability can exist in a self-defocusing medium if the nonlinearity is noninstantaneous. We predict the growth rate as a function of the spatial and temporal frequencies of the modulation and the response time of the nonlinearity and confirm it by our experiments.
© 2005 Optical Society of America
Wen-Han Chu, Chien-Chung Jeng, Chao-Hsian Chen, Yi-Hsin Liu, and Ming-Feng Shih, "Induced spatiotemporal modulation instability in a noninstantaneous self-defocusing medium," Opt. Lett. 30, 1846-1848 (2005)