Checks of homoclinic chaos made with nonlinear analysis techniques have been performed on the signals coming from a CO2 laser containing CH3I as a saturable absorber. The one-dimensional return maps of the regimes appearing inside the alternating periodic chaotic sequence are typical of homoclinic chaos. Numerical simulations give results in good agreement with the experimental observations. In the case of a fast absorber, a homoclinic tangency to a cycle created in a suberitical Hopf bifurcation is seen to be responsible for the homo-clinic behavior observed in the model.
© 1991 Optical Society of America
Original Manuscript: August 15, 1989
Manuscript Accepted: October 11, 1990
Published: February 1, 1991
M. Lefranc, D. Hennequin, and D. Dangoisse, "Homoclinic chaos in a laser containing a saturable absorber," J. Opt. Soc. Am. B 8, 239-249 (1991)