Theoretical analysis of optical fiber mode exciters constructed with alternate concatenation of step‐index and graded‐index fibers

Yahei Koyamada, Tsuneo Horiguchi, Masamitsu Tokuda, Naoya Uchida

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Mode exciters which consist of alternate concatenation of step‐index (S) and graded‐index (G) fibers are used widely for the measurement of transmission characteristics (optical loss and baseband frequency response) of multimode fibers. This paper presents a theoretical analysis for the mode exciters based on geometrical ray optics approximation. The mode power distribution controlling effect of the exciters, excited mode power distribution in the test fiber, and accuracy and reproducibility of optical loss measurements are clarified theoretically. It is shown that optical loss measurements under steady‐state distribution can be done by using either SGS or GSG mode exciters which consist of either small core or low NA fibers.

Original languageEnglish
Pages (from-to)66-74
Number of pages9
JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume68
Issue number3
DOIs
Publication statusPublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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