Optical isolator and Faraday rotator
AssigneeShin-Etsu Chemical Co., Ltd.
InventorToshiaki Watanabe
Life of this patent
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Abstract
A Faraday rotator and an optical isolator having a high transmittance and a high Verdet constant are provided. The optical isolator includes at least a Faraday rotator that rotates a polarization plane of incident light in a non-reciprocal manner, a polarizer disposed on a light incident side of the Faraday rotator, and an analyzer disposed on a light exit side of the Faraday rotator. The Faraday rotator is made of an oxide containing ytterbium oxide (Yb2O3), and is manufactured by a ceramic manufacturing process, wherein the oxide is allowed to contain an oxide of a metal other than ytterbium, and the proportion of ytterbium in all metal atoms in the oxide is 80% or more.
Claims5
An optical isolator comprising:
- at least a Faraday rotator that rotates a polarization plane of incident light in a non-reciprocal manner;
- a polarizer disposed on a light incident side of the Faraday rotator;
- and
- an analyzer disposed on a light exit side of the Faraday rotator,
- wherein the Faraday rotator is made of an oxide containing ytterbium oxide (Yb2O3), the Faraday rotator being manufactured by a ceramic manufacturing process, and
- wherein the oxide contains cerium oxide (CeO2) as an oxide of a metal other than ytterbium, and the proportion of cerium in all metal atoms in the oxide is 20% or less.
A Faraday rotator consists of an oxide containing ytterbium oxide (Yb2O3) and manufactured by a ceramic manufacturing process, wherein the oxide is allowed to contain an oxide of a metal other than ytterbium, and the proportion of ytterbium in all metal atoms in the oxide is 80% or more,
- wherein the oxide contains cerium oxide (CeO2) as an oxide of a metal other than ytterbium, and the proportion of cerium in all metal atoms in the oxide is 20% or less.
Dependencies are inferred from the claim text.