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

1984-10-29

1987-03-24

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2184, G01N 2159

Patent

active

046521232

ABSTRACT:
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 P.sub.21 and P.sub.22 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 power P.sub.11 and P.sub.12, respectively, from the two launching units. Loss at the junction is then computed from the relationship, splice loss:

REFERENCES:
patent: 4183666 (1980-01-01), Tahara et al.
Kohanzadeh "Hot Splices of Optical Waveguide Fibers", Applied Optics, Mar. 1976, vol. 15, #3, pp. 793-795.

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