EP0283227A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical isolator
Assignee: Seiko Instruments Inc
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Filing: 1988-03-14
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Granted: —
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Expires: 2008-03-14
Abstract
Abstract An optical isolator comprising in combination a polarizer or a polarizing beam splitter (6) and a one-quarter wave retarder (7) characterised in that said polarizer or polarizing beam splitter (6) and said one-quarter wave retarder (7) are constituted by optical fibre members.
Inventors
- 👤 Yasuhiro Takemura
- 👤 Toshiharu Takesue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 08:47
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4207; G02B6/4208; G02B6/26; G02B6/28; G02B6/2804; G02B6/2821
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
An optical isolator comprising in combination a polarizer or a polarizing beam splitter (6) and a one-quarter wave retarder (7) characterised in that said polarizer or polarizing beam splitter (6) and said one-quarter wave retarder (7) are constituted by optical fibre members.
Claim 2
Dependent Claim
42 words
An optical isolator comprising in combination a polarizer or a polarizing beam splitter (6) and a one-quarter wave retarder (7) characterised in that said polarizer or polarizing beam splitter (6) and said one-quarter wave retarder (7) are constituted by optical fibre members.
Claim 3
Dependent Claim
27 words
An optical isolator according to claim 1 characterised in that said polarizer or polarizing beam splitter (6) and said one-quarter wave retarder (7) comprise single-mode fibre couplers.
Claim 4
Dependent Claim
32 words
An optical isolator according to claim 1 or 2 characterised in that said polarizer or polarizing beam splitter (6) is connected to said one-quarter wave retarder (7) through a fibre-optic connector (8).
Claim 5
Dependent Claim
29 words
An optical isolator according to claim 1 or 2 characterised in that said polarizer or polarizing beam splitter (6) is connected to said one-quarter wave retarder (7) by fusion.
Claim 6
Dependent Claim
22 words
An optical isolator according to any preceding claim characterised in that the optical isolator is optically coupled to a light source (1).
Claim 7
Dependent Claim
29 words
An optical isolator according to claim 5 in which the light source (1) is optically coupled to the polarizing beam splitter (6) by way of a coupling lens (5).
References Cited (Backward Citations)
No citation records indexed.
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