OPA illustration (IMAGE) Optica Caption The new OPA that replaces the multiple emitters of traditional OPAs with a slab grating to create a single emitter. This design enables a wide field of view without sacrificing beam quality. Credit Hao Hu, Technical University of Denmark 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.