Mode transition matrix measuring system

Details Mode transition matrix measuring system Mode transition matrix measuring system

1992-02-25

1993-10-05

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2159, G01N 2184

Patent

active

052510026

ABSTRACT:
A mode transition matrix measuring system for nondestructively calculating mode-dependent losses and coupling of a multi-mode, graded-index, connectorized, passive fiber optic component, the mode transition matrix measuring system comprising mode selective launcher means having a plurality of optical paths with varying launch conditions, input-output optic means having at least one reference optical path and at least one optical path for the passive fiber optic component under test, mode selective detection means having a plurality of optical paths with a variety of mode filters, and means for data storage and matrix calculation, wherein the mode transition matrix and the modal power vector are calculated using measurements of the optical power propagated through optical courses comprising the optical paths.

REFERENCES:
Okoshi et al., "Measuring the Complex Frequency Response of Multimode Optl Fibers", Applied Optics, vol. 20, No. 8, Apr. 15, 1981, pp. 1414-1417.

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