Adaptive feedback (VIDEO) Optica This video is under embargo. Please login to access this video. Caption The researchers implemented a feedback loop that detects when signals are very large and adjusts the input laser power accordingly. This allowed them to detect large signals from high concentrations without overwhelming the weak signals that may be present from another species at low concentrations. Credit Holger Schmidt, ECE Department, University of California, Santa Cruz Usage Restrictions None License Original 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.