Method of measuring optical attenuation using an optical time do

Details Method of measuring optical attenuation using an optical time do Method of measuring optical attenuation using an optical time do

1994-01-13

1995-09-19

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2188

Patent

active

054520711

ABSTRACT:
The optical reflector plates 11, 12 and 13 are connected at the ends of the optical fiber cables 8, 9, and 10, respectively. An optical waveguide directional coupler 2 which has at least one input common terminal A and at least two output terminals B and C is provided between an OTDR 1 and a measuring optical fiber cable 5. The output terminal B is connected to an end of the optical fiber cable 6, and the output terminal C is connected to an optical reflector plate 4 through an optical variable attenuator 3 which can changed the optical attenuation of passing light. The OTDR 1 supplies a light pulse to the input common terminal A, and measures the optical attenuation of the measuring optical fiber cable 5 by using differences in the intensity of reflected light pulses, which are reflected at each optical reflector plate 4, 11, 12, and 13.

REFERENCES:
patent: 4304489 (1981-12-01), Wakabayashi et al.
patent: 5187362 (1993-02-01), Keeble
patent: 5251001 (1993-10-01), Dave et al.
Optische Telekommunikationssysteme, W. Haist, Hrsg., Bd. I: Physik und Technik, Gelsenkirchen-Buer 1989, Seiten 245-249.
"Fiber Measurement Techniques For Passive Double Star Networks", Izumi Sankawa et al., Third IEEE Workshop on Local Optical Networks, vol. 9, pp. 4.2-2-4.2-10 (1991).

Affiliated with

Also associated with

Rating

Method of measuring optical attenuation using an optical time do does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of measuring optical attenuation using an optical time do, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring optical attenuation using an optical time do will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1832417