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Applied Optics

Applied Optics


  • Vol. 24, Iss. 24 — Dec. 15, 1985
  • pp: 4408–4413

Optimum length of multimode optical branching waveguide for reducing its mode dependence

Y. Kokubun, T. Fuse, and K. Iga  »View Author Affiliations

Applied Optics, Vol. 24, Issue 24, pp. 4408-4413 (1985)

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In this paper, we theoretically analyze the loss and branching ratio of multimode optical branching waveguides by using a ray tracing method to obtain less mode-dependent branching characteristics. First, a 2 × 2 optical mixing and branching waveguide with a step-index profile are considered. It is found that an optimum length to achieve a low loss and stable branching ratio exists. Second, a waveguide with mode scrambler is investigated. By sacrificing some amount of insertion loss, the mode dependence can be minimized.

© 1985 Optical Society of America

Original Manuscript: February 2, 1985
Published: December 15, 1985

Y. Kokubun, T. Fuse, and K. Iga, "Optimum length of multimode optical branching waveguide for reducing its mode dependence," Appl. Opt. 24, 4408-4413 (1985)

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  1. M. Oikawa, K. Iga, “Stacked Array Components with Distributed-Index Planar Microlens,” at Fourth Topical Meeting on Graded-Index Optical Imaging Systems (Kobe, 1983), paper H2.
  2. E. G. Rawson, M. D. Bailey, “Bitaper Star Couplers with up to 100 Fiber Channels,” Electron. Lett. 15, 432 (1979). [CrossRef]
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  7. Y. Kokubun, S. Suzuki, T. Fuse, H. Uehara, K. Iga, M. Oikawa, S. Misawa, “A Novel Mode Scrambler for Reducing Mode Dependence in Multimode Optical Waveguide,” Electron. Lett. 19, 1009 (1983). [CrossRef]
  8. M. Oikawa, K. Iga, T. Sanada, “Distributed-Index Planar Microlens Array Prepared from Deep Electromigration,” Electron. Lett. 17, 452 (1981). [CrossRef]

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