Device for measuring the attenuation of optical waves in an...

Details Device for measuring the attenuation of optical waves in an... Device for measuring the attenuation of optical waves in an...

G - Physics

01

N

73/53

G01N 21/00 (2006.01) H04B 10/08 (2006.01)

Patent

CA 1112894

ABSTRACT For the purpose of measuring the damping (attenuation) in a light- wave-guide fibre definitely and reproducibly, it is proposed to offer the light-wave guide to be measured a mode distribution which corresponds to the "steady state" of a very long fibre. To this end, a mode mixer and a mode stripper are located before the light-wave guide to be measured. All core- modes, leakage-modes and casing-modes are excited in the mode mixer. The casing- and leakage-modes are stripped away again (absorbed) in the mode stripper, leaving a mode distribution comparable with the "steady state".

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