Microwave-optical experiment on bismuth-substituted yttrium iron garnet

Abstract
Microwave-optical experiments were made on a bismuth-substituted yttrium iron garnet Y2.55Bi0.45Fe5O12. It was shown that about a 1% amplitude modulation of He-Ne laser (6328 Å) will be obtained for the analyzer set at 45° if we input 12 mW microwave (9180 MHz) power. It was also shown that the degree of modulation depends not only on the Faraday effect but also on the Voigt effect in general.