Laser Focus (IMAGE) Princeton University, Engineering School Caption Kale Franz, a graduate student at Princeton's electrical engineering department, and Stefan Menzel, a graduate student at the University of Sheffield, UK, collaborated in the discovery and analysis of a new method of producing laser beams, which could lead to more efficient devices for medical diagnostics and environmental sensing. Credit Frank Wojciechowski 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.