Plastic Q-switch for ruby lasers

Plastic Q-Switch for ruby lasers is a plastic version of the bleachable dye Q-switch, that has been developed by the authors for a couple of years. By solidification, the defects of the liquid bleachable dye Q-switch are rejected and it is reported Plastic Q-Switch (PQS) is the most efficient passive Q-Switch (1). PQS is very stable against UV radiation. This report is on the recent results of PQS especially on reducing the damage induced in PQS by the laser beam. Preparation and material for PQS will also be discussed.