Paradox Laser -- Gain and Loss (image) Princeton University, Engineering School Caption Manipulating minute areas of gain and loss within individual lasers (shown as peaks and valleys in the image), researchers were able to create paradoxical interactions between two nearby lasers. Credit Vienna University of Technology Usage Restrictions For non-commercial use. 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.