Figure 1 (IMAGE) Japan Science and Technology Agency Caption Block diagram of Faraday effect measurement system using dual-comb spectroscopy. The signal comb (red line) passes through the sample and is superposed with the local comb (blue line). The vertical and horizontal components of the interference signal are detected by the two optical receivers. Applying magnetic field to the sample, the Faraday effect (Faraday rotation angle) is measured. Credit ©The University of Electro-Communications, Kaoru Minoshima, and NEOARK 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.