Q Switch (IMAGE) Toyohashi University of Technology (TUT) Caption The first high-powered, randomly polarized laser beam with a 'Q switch' laser. Optical pulses were controlled by electrical signals. Credit COPYRIGHT (C) TOYOHASHI UNIVERSITY OF TECHNOLOGY. ALL RIGHTS RESERVED. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.