Microring Optical Parametric Oscillator (IMAGE) Optica Caption Efficient optical parametric oscillation occurs in a microring (central light blue ring) on a silicon chip, so that an infrared laser (900-nanometer wavelength, depicted in green) coupled into the ring is transformed into light in both the visible (700-nanometer wavelength, depicted in red) and telecom (1300-nanometer wavelength, depicted in blue). Credit Xiyuan Lu, NIST/University of Maryland, inspired by the "Olympic rings." Usage Restrictions None License Licensed 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.