Patent ID: 7826690

Claim:
A waveguide type optical isolator comprising: a substrate; a waveguiding layer; a magnetic garnet; a magnetic field applying means; and a package substrate; wherein: a waveguide is formed in the waveguiding layer; the magnetic field applying means includes a first magnet and a second magnet; the first magnet and the second magnet are housed and fixed within a magnet holder; the magnet holder comprises a base portion and at least three protruded portions, including a first protruded portion that extends from the base portion, a second protruded portion that extends from the base portion, and a third protruded portion that extends from the base portion; a first housing portion is formed with the base portion, the first protruded portion, and the second protruded portion; a second housing portion is formed with the base portion, the second protruded portion, and the third protruded portion; the first magnet is housed and fixed within the first housing portion; and the second magnet is housed and fixed within the second housing portion.