Abstract: Two AO modulators driven synchronisticaly by two lower power RF drivers are arranged in a resonator for the purpose of increasing the avenge power of AO Q-switched Nd: YAG laser. Upon synchronizing reform the experiments with two RF drivers are conducted, which shows that the average power of AO Q-switehed Nd:YAG laser is about twice as much as before: The maximum average power is over 100W.