Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1991-07-24
1992-08-11
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
G01N 2188, G01N 2159
Patent
active
051373513
ABSTRACT:
An OTDR includes an optical source, an optical detector, and two optical fiber connectors respectively for connection of a single mode fiber or a multi-mode fiber to be tested. Optical paths selectively couple either the source to the first connector and the first connector to the detector, or the source to the second connector and the second connector to the detector. The path from the source to the first connector consists of single-mode fiber, the path from the second connector to the detector consists of multi-mode fiber, and the paths from the first connector to the detector and from the source to the second connector each consist of single mode fiber followed by multi-mode fiber. The selective coupling is achieved using an optical switch and two optical couplers.
REFERENCES:
patent: 4737026 (1988-04-01), Dalgoutte et al.
patent: 4737027 (1988-04-01), Maeda
patent: 4875772 (1989-10-01), Gentile
patent: 4932742 (1990-06-01), Tohme
patent: 5067810 (1991-11-01), Bu-Abbud
"WM4 A 0.3-dB single mode fiber switch" by Harold A. Roberts and Robert A. Eno, Optical Fiber Conference, 1990.
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