Wideband Frequency Comb (IMAGE) University of California - San Diego Caption A wideband frequency comb ensures that the crosstalk between multiple communication channels within the same optical fiber is reversible. Credit UC San Diego Photonics Systems Group Usage Restrictions Please credit UC San Diego Photonics Systems Group. 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.