ファブリ · ペロー共振を利用したファラデー回転素子

抄録

A Fabry-Perot resonance (F.P.R.) type Faraday rotator which consists of a magneto-optic medium with mirror coating at the ends has been made. The Faraday rotation of the medium is enhanced (1+Re^-αl)/(1−Re^-αl) times (R: reflectivity of the mirror, e^-αl: optical loss of the medium) under F.P.R. condition. As a theory predicts, the Faraday rotations of the rotators using Pyrex glass and GGG with silver coating of R=0.83 and 0.9 were enhanced 10 and 20 times, respectively, while, when the rotator using LPE-garnet film with silver coating of R=0.8 was used, the enhancement was limited to 3 times. The difference comes from the effect of the optical absorption e^-αl.