The effect of coupling two chaotic Nd:YAG lasers with intracavity KTP crystal for frequency doubling is numerically studied for the case of the laser operating in three longitudinal modes. It is seen that the system goes from chaotic to periodic and then to steady state as the coupling constant is increased. The intensity time series and phase diagrams are drawn and the Lyapunov characteristic exponent is calculated to characterize the chaotic and periodic regions.
T. Kuruvilla and Dr. V . M. Nandakumaran, “Dynamics of two coupled chaotic multimode Nd: YAG lasers with intracavity frequency doubling crystal”, Pramana, vol. 54, pp. 393–402, 2000.