Method of testing spliced portion of optical fibers

Details Method of testing spliced portion of optical fibers Method of testing spliced portion of optical fibers

1988-12-16

1990-08-07

Noland, Tom

Measuring and testing

Instrument mechanism or transmission

Rate of change

738659, 356 731, C01M 1900

Patent

active

049457764

ABSTRACT:
In a method of testing a spliced portion of exposed fiber portions of optical fibers, the optical fibers are arranged with each other in line so that ends of the exposed fiber portions are spaced apart from each other by a predetermined distance. The ends of the exposed fiber portions are heated and melted by discharge heating. The optical fibers are then moved in the abutment or closing directions by a predetermined distance, so that the ends of the exposed fiber portions abut against each other to form a spliced portion. The minimum outer diameter value d of the spliced portion is measured. Ratio d/D of minimum value d to value D of the outer diameter of exposed fiber portion is calculated. Spliced portions having splicing defects can be detected by detecting of spliced portions having ratio d/D of less than 1 (d/D<1). That is, spliced portions having ratio d/D of less than 1 (d/D<1) are regarded as splicing defects.

REFERENCES:
patent: 4498732 (1985-02-01), Campbell et al.
patent: 4812038 (1989-03-01), Nazarathy et al.
patent: 4838690 (1989-06-01), Buckland et al.
"Method for Evaluating Splicing Loss of Multimode Optical Fiber"; Patent Abstracts of Japan; ABS GRP No., p. 626, vol. No. 11, No. 313, pub. Oct. 13, 1987 (English Language Abstract of Japanese Pat. Document 62-103607, ref. L).
A Splicing and Inspection Technique for Single-Mode Fibers Using Direct Core Monitoring; 1984 IEEE; Journal of Lightwave Technology, No. 2, (Apr.); pp. 185-190; Osamu Kewata et al.
Statistical Analysis of Fusion Splice Losses for Single-Mode Fibers; oct. 1984; Applied Optics, vol. 23, No. 19, pp. 3289-3293; Osamu Kawata.

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