Single-photon Raman underwater lidar (IMAGE) Optica Caption Researchers developed a single-photon Raman lidar system that operates underwater and can remotely distinguish various substances They demonstrated the system by using it to detect varying thicknesses of gasoline oil in a quartz cell that was 12 meters away from the system in a large pool. Credit Mingjia Shangguan, Xiamen University 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.