Method for using on line optic fiber loss monitor

Glass manufacturing – Processes – Forming product or preform from molten glass

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65 11W, 65 13, 65 29, 65158, 356201, C03B 3702

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active

040812588

ABSTRACT:
A method and means is disclosed for continuously monitoring an optical fiber's attenuation or loss as it is being formed, which includes: a light source, which may be the heated fiber itself during drawing operations or an external source; passing the light through the fiber being produced; positioning the end of the fiber in a holder adjacent to a light detector, for example a photodiode with or without passing the transmitted light through a filter; detecting the light transmitted by the fiber from the light source; converting the detected light into an electrical equivalent signal; amplifying the signal if necessary and recording or observing the changes in the signal to determine an objective measure of the optical fiber's attenuating characteristic.

REFERENCES:
patent: 3690774 (1972-09-01), Kottle et al.
patent: 3879128 (1975-04-01), Presby
Bell Laboratories Record, Nov., 1972, pp. 303-311, "Measuring Loss in Optical Fibers," Arthur Tynes.
Applied Optics, March, 1974, vol. 13, #3, pp. 467-469, "Power Handling . . . Lightguides," John Crow.

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