Attenuation across optical fiber splice

Details Attenuation across optical fiber splice Attenuation across optical fiber splice

1983-10-25

1986-12-16

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2184

Patent

active

046293167

ABSTRACT:
This invention provides a method and apparatus for making certain measurements across a splice of a first optical fiber and a second optical fiber, then calculating the actual decibel attenuation across the splice for optical signals transmitted through the fibers during actual use. The method of this invention involves measuring the optical power P.sub.2 in the second fiber with the fiber ends separated longitudinally a certain distance, then measuring the optical power P.sub.1 in the second fiber with the fiber ends positioned close together for effecting the splice. The attenuation is calculated from the formula

REFERENCES:
Kato et al., "New Optical Monitoring Method for Arc Fusion Splice of Single-Mode Fibres & High-Precision Estimation of Splice Loss", Electronics Letters, 28 Oct. 1982, vol. 18, #22, pp. 972-973.

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