Fiber measurement system

Details Fiber measurement system Fiber measurement system

2005-08-16

2005-08-16

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

06930766

ABSTRACT:
A fiber measurement system for obtaining a fiber bending loss data of a moving fiber when compared with a static fiber is provided. The system includes an optical transmitter for generating a first optical modulating signal, a first optical coupling device electrically connected to the optical transmitter for coupling the first optical modulating signal from the static fiber to the moving fiber, a perturbing device electrically connected to the first optical coupling device for modulating the first optical modulating signal of the moving fiber to a second optical modulating signal, a second optical coupling device electrically connected to the perturbing device for coupling the second optical modulating signal from the moving fiber to the static fiber, an optical receiver electrically connected to the second optical coupling device for reading the second optical modulating signal, and a filter electrically connected to the optical receiver for filtering the second optical modulating signal, thereby obtaining the fiber bending loss data.

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M. Miyamoto et al., “Bending Loss Evaluation of Single-Mode Fibers with Arbitrary Core Index Profile by Far-Field Pattern”, Journal of Lightwave Technology, vol. 8, 1990, pp. 673-677.
W. Freude et al., “Propagation Constant of Single-Mode Fibers Measured from the Mode-Field Radius and from the Bending Loss”, Jornal of Lightwave Technology; vol. 7, pp. 225-228.

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