Experimental setup (IMAGE) Optica Caption The new system includes a transmitter that consists of an erbium-doped fiber amplifier optical power source and a receiver with a ball lens retroreflector that helps boost performance. Credit Jinyong Ha, Sejong 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.