Design for polymer optical waveguides realizing efficient light coupling via 45-degree mirrors

Yoshie Morimoto, Takaaki Ishigure

Research output: Contribution to journalArticle

1 Citation (Scopus)


We design graded-index (GI) circular-core waveguides to realize low-loss light coupling via 45-degree mirrors using a ray-trace simulator. The waveguide’s structural parameters, which determine the insertion loss of the waveguides with 45-degree mirrors, are the cladding thickness, the core size, the refractive index of materials, and the mirror angle. The optimum waveguide structural parameters are determined, and the GI circular-core waveguide with the appropriate structural parameters which is actually fabricated exhibits much lower total link loss than step-index (SI) core waveguides. The tight optical confinement of the GI-core contributes to the reduction of loss increment due to the mirror structure.

Original languageEnglish
Pages (from-to)10839-10853
Number of pages15
JournalOptics Express
Issue number8
Publication statusPublished - 2019 Apr 15


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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