Optical fiber test method and apparatus

Details Optical fiber test method and apparatus Optical fiber test method and apparatus

1984-11-19

1987-04-21

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356435, G01N 2184, G01N 2159

Patent

active

046592156

ABSTRACT:
A test optical fiber is slightly bent to a restorable extent, and light is side-illuminated on the bent portion to couple an optical signal to the test fiber. The optical signal coupled to the fiber by this method, propagates through the optical fiber in both directions. If the bending point, which is the point of coupling, is provided near one end of the optical fiber, because the power of the optical signal output from the end is substantially one half of the power of an optical signal coupled at the bending point, the transmission loss of the optical fiber can be measured by comparing the optical power with the optical power of the signal reaching the other end of the fiber.

REFERENCES:
patent: 4183666 (1980-01-01), Tahara et al.

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