Device and a method for distinguishing faults employed in an opt

Details Device and a method for distinguishing faults employed in an opt Device and a method for distinguishing faults employed in an opt

1990-12-10

1993-01-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022723, 356 731, H01J 516

Patent

active

051773546

ABSTRACT:
The present invention discloses a fault distinguishing device for establishing whether fault exists in an optical fiber cable and in another optical system. The disclosed device is intermediate between the optical fiber cable and the another optical system and optically coupled with the optical fiber cable and the another optical system. The disclosed device is composed of at least one intrinsic optical fiber and at least one optical filter. The optical filter is internal to a corresponding intrinsic optical fiber, and forms an angle of between 0 and 4.7 degrees inclusive with respect to a plane perpendicular to the longitudinal axis of the intrinsic optical fiber, such that the optical fiber is cable of reflecting a first light component and of transmitting a second light component. The first light component and the second light component differ from one another in terms of wavelength.

REFERENCES:
patent: 3981592 (1976-09-01), Williams
patent: 4373775 (1983-02-01), Gasparian
patent: 4637682 (1987-01-01), Mahlein et al.
patent: 4749247 (1988-06-01), Large
patent: 4774407 (1988-09-01), Erbe
patent: 4813756 (1989-03-01), Frenkel et al.
patent: 4848999 (1989-07-01), Taylor
patent: 4899043 (1990-02-01), Mochizuki et al.
patent: 4899045 (1990-02-01), Kramer
patent: 5001338 (1991-03-01), Boero
The Bell System Technical Journal, vol. 56, No. 5, May-Jun. 1977 "Loss Analysis of Single-Mode Fiber Splices", D. Marcuse, pp. 703-718.

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