Patent ID: 9533917
Date: 2017-01-03
CPC Classifications: C01G,C01P,C04B,G02B,G02F,Y10T

Claim:
1. A magneto-optical device comprising a magneto-optical element which is a light-transmitting bismuth-substituted rare-earth iron garnet-type calcined body expressed by the formula R 3-x Bi x Fe 5 O 12 and having an average crystal particle diameter of 0.3-10 micrometers; wherein R is at least one kind of elements selected from a group consisting of Y and lanthanoids, and x is a number from 0.5 to 2.5, wherein, in response to a 1310-nm-wavelength light, said light-transmitting bismuth-substituted rare-earth iron garnet-type calcined body causes the light, in a forward direction, to have an insertion loss of 1.0 dB or lower and an extinction ratio of 35 dB or higher.