Method and apparatus for measuring absolute fiber junction loss

Details Method and apparatus for measuring absolute fiber junction loss Method and apparatus for measuring absolute fiber junction loss

H - Electricity

01

P

354/23

H01P 3/20 (2006.01) G01M 11/00 (2006.01) G02B 6/28 (2006.01) G08C 25/00 (2006.01)

Patent

CA 1213057

METHOD AND APPARATUS FOR MEASURING ABSOLUTE FIBER JUNCTION LOSS Abstract of the Disclosure For use in measuring the absolute loss at a junction site between two fibers, two devices for directing light into the fiber from points upstream and downstream of the junction site are coupled to the fiber and remain in their coupled positions throughout the measurement procedure. A detector unit is then coupled to the fiber just downstream of the junction and used to measure optical powers P21 and P22 resulting from the upstream and downstream launching units respectively. A detector unit is then coupled to the fiber just upstream of the junction to measure powers P11 and P12, respectively, from the two launching units. Loss at the junction is then computed from the relationship, splice loss: L2 = P21P12/P11P22 A two way detector compensated for bidirectional detection is used. Both the light launching and detection units can be easily coupled to the fiber to permit local, non-destructive splice loss measurement. - i -

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