Research Signpost 37/661 (2), Fort P.O., Trivandrum-695 023, Kerala, India Recent Advances in Laser Dynamics: Control and Synchronization (2008) ISBN: Chapter 9. Chaotic dynamics of the vibronic laser Wojciech Gadomski and Bozena Ratajska-Gadomska Laboratory of Physicochemistry of Dielectrics and Magnetics, Department of Chemistry, Warsaw University, ul. Żwirki I Wigury 101, 02-089 Warsaw, Poland Abstract Herewith we present the nonlinear dynamics of a very interesting group of lasers, e.g. vibronic lasers, where due to the pump-dependent population of the lattice phonons, the photon energy of the pump serves as the control parameter. Experimental results and the theoretical predictions are compared for the particular case of the alexandrite laser. We discuss its rich dynamics including homoclinic chaos, small- scale chaos and crisis, the possibility of modulation control, the cavity length control and the optical feedback scheme of chaos control. Correspondence/Reprint request: Prof. Wojciech Gadomski, Laboratory of Physicochemistry of Dielectrics and Magnetics, Department of Chemistry,Warsaw University, ul. Żwirki I Wigury 101, 02-089 Warsaw, Poland. E-mail: gado@chem.uw.edu.pl