1.7MW Nd:YAG Laser Pulse Generation by A Passive BDN Q-switch

This paper describes the passive Q-switch, based on polymer and organic dye BDN, of a pulsed Nd:YAG laser. Pulses of 27ns duration and peak power of 1.7MW for initial transmission of Q-switch have been obtained. We have obtained Q-switching efficiency of 77% for train of pulses of 31 and at the pump energy of 98J. We have also obtained the dependency of laser pulse characteristics on pump energy and initial transmission of Q-switch. We have obtained the damage threshold of this Q-switch at the pulse duration of 27ns to be 13J/cm2 .