Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
An optical isolator comprising a cylindrical magnet (3) magnetized in a direction parallel to the axis of rotational symmetry thereof, a Faraday rotator (FR) disposed in a center space of said cylindrical magnet (3) and a pair of beam splitters (P1, P2) capable of serving as a polarizer or an analyzer arranged on both sides of said Faraday rotator (FR) with inclination of 45° relative to each other, characterized in that the outer diameter Do, the inner diameter Di and the length L of said cylindrical magnet (3) are in the range defined by where α=Do/Di.
Claim 2
Dependent Claim
96 words
An optical isolator comprising a cylindrical magnet (3) magnetized in a direction parallel to the axis of rotational symmetry thereof, a Faraday rotator (FR) disposed in a center space of said cylindrical magnet (3) and a pair of beam splitters (P1, P2) capable of serving as a polarizer or an analyzer arranged on both sides of said Faraday rotator (FR) with inclination of 45° relative to each other, characterized in that the outer diameter Do, the inner diameter Di and the length L of said cylindrical magnet (3) are in the range defined by where α=Do/Di.
Claim 3
Dependent Claim
101 words
A multi-stage optical isolator comprising N Faraday rotators (FR-1, FR-2 ...), N cylindrical magnets (3a, 3bʹ ...) each accommodating each of said rotators, and N+1 beam splitters (P1, P2, Pʹ3 ...) capable of serving as a polarizer or an analyzer, characterized in that said Faraday rotators (FR-1, FR-2 ...) and said beam splitters (P1, P2, Pʹ3 ...) are arranged alternately in tandem; that said N cylindrical magnets (3a, 3bʹ ...) are magnetized in the direction of the optical axis; and that any two adjacent cylindrical magnets (3a, 3bʹ) are arranged with their magnetic poles of the same polarity facing each other.
Claim 4
Dependent Claim
101 words
A multi-stage optical isolator comprising N Faraday rotators (FR-1, FR-2 ...), N cylindrical magnets (3a, 3bʹ ...) each accommodating each of said rotators, and N+1 beam splitters (P1, P2, Pʹ3 ...) capable of serving as a polarizer or an analyzer, characterized in that said Faraday rotators (FR-1, FR-2 ...) and said beam splitters (P1, P2, Pʹ3 ...) are arranged alternately in tandem; that said N cylindrical magnets (3a, 3bʹ ...) are magnetized in the direction of the optical axis; and that any two adjacent cylindrical magnets (3a, 3bʹ) are arranged with their magnetic poles of the same polarity facing each other.
Claim 5
Dependent Claim
78 words
The multi-stage optical isolator according to claim 2, wherein assuming that the first beam splitter (P1) on the side of incident light has a polarization angle of about 0°, the angle of the plane of polarization of the even beam splitters (P2, P4 ...) is within 45°±5° with reference to the polarization angle of the first beam splitter (P1), while the polarization angle of the odd beam splitters (P1, P3 ...) including the first one is within 0±5°.