Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1990-12-26
1992-07-28
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
G01N 2184, G01N 2159
Patent
active
051335972
ABSTRACT:
A device and method for measuring transmission loss in an optical waveguide. The device includes a base on which an optical waveguide can be secured. A first clamp is mounted on the base so that the first clamp can be fixed relative to the secured waveguide. The first clamp secures the first prism for coupling with the waveguide so that the first prism can guide light to enter the waveguide. A second clamp is mounted on the base so that the second clamp can alternatively be fixed or shifted relative to the waveguide. A second prism is secured to the second clamp for coupling with the waveguide so that part of the light in the waveguide exits by way of the second prism. Also provided is a device for adjusting the distance between the first and second prisms, a first sensor for detecting the optical power of the light exited from the waveguide through the second prism and a second sensor for detecting the optical power of the light exiting the waveguide through the waveguide's rear end face.
REFERENCES:
Won et al., "Three-Prism Loss Measurements of Optical Waveguides", Appl. Phys. Lett. 37(3), Aug. 1, 1980, pp. 269-271.
Chen San M.
Huang Seng B.
Industrial Technology Research Institute
McGraw Vincent P.
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