Loss Variation in Handling Optical Fibers

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  • 光ファイバハンドリング時の損失変動
  • ヒカリ ファイバ ハンドリングジ ノ ソンシツ ヘンドウ

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Because of the characteristic features of optical fibers, their transmission loss varies for an instant when a bend or a torsion is caused to them by engineering works, etc., and, in the worst case, this may affect the communication system at work.<br>In the present optical fiber communication systems, various services are transmitted through a single optical fiber as a multiplex transmission line. Therefore, the deterioration in the quality of a circuit, which may be caused by engineering works, has an extremely great influence.<br>With a view to finding the method to avoid such a serious situation, we carried out an optical fiber engineering work as an experiment which was so designed as to reproduce the condition of an actual engineering work as closely as possible. As a result, the characteristic of the loss variation of the existing circuits and its effect on the optical communication systems were clarified.<br>In addition, based on the result of this experiment, we prepared a guideline for the method of designing the circuits to eliminate the effect of optical fiber engineering works on the existing circuits as far as possible.

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