Properties of Nd:YAG laser with the nonlinear absorption of the intracavity fullerenes

The experimental results on the quenching of self mode-locking effect in free running or Q-switched Nd:YAG laser with fullerenes were observed. It was found that the self mode-locking phenomenon in free running or Q-switched Nd:YAG laser was partly or completely quenched when some fullerenes samples, such as C₆₀ toluene solution and C₆₀ in polymethyl methacrylate, were placed into the laser cavity. The degree of quenching is related to the thickness and concentration of the fullerenes samples. A qualitative analysis for the experimental results show that the nonlinear absorption of the intracavity fullerenes results in this effect.