Study of cooperative effect radiation loss of solid laser

Cooperative effect radiation loss of optical pump solid laser was investigated deeply. Using Maxwell-Bloch equation the characteristic and cause of coherent spontaneous were discussed.By laser rate equation, the expression of upper energy level lifetime shortening due to the cooperative effect radiation was given. The influence of cooperative effect for laser threshold and the loss were analyzed. Through the experiment, the relation of coherent spontaneous radiation intensity and direction with reversal population and the power of optical pump was obtained. © 2009 SPIE.