Electro-optic Laser Colors (image) National Institute of Standards and Technology (NIST) Share Print E-Mail Caption Graphic depicting how specific frequencies, or colors, of light (sharp peaks) emerge from the electronic background noise (blue) in NIST's ultrafast electro-optic laser. The vertical backdrop shows how these colors combine to create an optical frequency comb, or "ruler" for light. Credit D. Carlson/NIST Usage Restrictions Please use correct image credit Share Print E-Mail 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.