Optical loss measurement in graded-index fiber using a dummy fiber

Mitsuhiro Tateda, Tsuneo Horiguchi, Masamitsu Tokuda, Naoya Uchida

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


The utility of an auxiliary fiber, called a dummy fiber, is investigated for optical fiber loss measurements. The dummy fiber is spliced and used to excite the test fiber. Excess loss caused by undesirable modes is found to be reduced to less than 0.05 dB by using a 500-m dummy fiber and choosing the test fiber cut length to be 2 m for reference. Loss linearity to the fiber length is examined on 6-km spliced fibers, and satisfactory agreement is obtained between the total loss and the sum of the individual fiber and splice losses.

Original languageEnglish
Pages (from-to)3272-3275
Number of pages4
JournalApplied Optics
Issue number19
Publication statusPublished - 1979 Oct 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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