Non-stationary characteristics of instability in a single-mode Nd : YVO4 laser with fiber feedback

Random chaotic burst generation was experimentally observed in a single-mod e microchip Nd:YVO4 laser with fiber feedback. As the feedback strength was increased, a transition from stable relaxation oscillation state to unstab le random chaotic burst state appeared. Furthermore, the non-stationary cha racteristic of probability association was experimentally identified at the transition of the two states while similar characteristics were reported o nly by numerical simulations of simple dynamical systems. This implies the general feature of non-stationary property of the dynamic switching between two states at transition. The observed chaotic burst generation and non-st ationary nature were reproduced numerically based on the Lang-Kobayashi mod el.