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  • Symposium on Optical Fiber Measurements, 1982
  • Technical Digest Series (Optica Publishing Group, 1982),
  • paper BM25

Results of A Bell System Bandwidth Measurement Round Robin

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Abstract

Recently a multimode-fiber bandwidth-measurement round robin was conducted among several locations of Bell Laboratories and Western Electric. Analysis of the results has clarified some of the problems in obtaining agreement between test sets. The five participants measured the seven fibers in the study three times each. Fibers 1-5 had low OH content and were measured at both short (825 nm) and long (1300 nm) wavelengths. Fibers 6 and 7 had high OH content and were only measured at the short wavelength. The instructions requested that the participants overfill the fiber, use a mandrel wrap (3 turns around a 20-mm-diameter mandrel) at the input end, and break off a piece of the input end containing the mandrel for the short length measurement (without disturbing the launch conditions). All test sets operated in the time domain.

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