Bismuth-substituted rare earth iron garnet single crystal, faraday rotator, optical isolator, and production method for bismuth-substituted rare earth iron garnet single crystal
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsToshiaki Watanabe, Satoru Fukuda
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Abstract
A bismuth-substituted rare earth iron garnet single crystal suitable for Faraday rotators and optical isolators with reduced insertion loss due to suppressed valence fluctuation of Fe ions is provided. The bismuth-substituted rare earth iron garnet single crystal of the present invention is characterized by the composition formula (GdaLnbBicMg3−(a+b+c))(FedGaeTifPt5−(d+e+f))O12. In the composition formula above, 0.02≤f≤0.05, 0.02≤{3−(a+b+c)}≤0.08, and −0.01≤{3−(a+b+c)}−{f+5−(d+e+f)}≤0.01. Ln is a rare earth element and may be selected from Eu, Dy, Gd, Ho, Tm, Yb, Lu, and Y.
Claims6
A bismuth-substituted rare-earth iron garnet single-crystal having the composition formula Gda LnbBicMg3−(a+b+c))(FedGaeTifPt5−(d+e+f))O12, wherein in the composition formula above, 0.02≤f≤0.05, 0.02≤{3−(a+b+c)}≤0.08, and −0.01≤{3−(a+b+c)}−{f+5−(d+e+f)}≤0.01, and Ln is a rare-earth element selected from the group consisting of Eu, Dy, Gd, Ho, Tm, Yb, Lu, and Y, wherein a>0, b>0, c>0, d>0, and e>0.
Dependencies are inferred from the claim text.