Apparent inequivalence between the in- and outcoupling angles of prism coupled IO waveguides

D. S. Walker, S. Putegnat, S. S. Saavedra, W. M. Reichert

Research output: Contribution to journalArticle


The incoupling and outcoupling angles of a thin film waveguide were determined using the conventional prism coupling configuration. The consistent intermodal spacing observed between incoupling and outcoupling angles indicated that these angles contained equivalent information on the waveguide structure. However, a geometry mismatch between the rotation goniometer and the triangular coupling prisms produced a systematic error in the determination of the outcoupling angles that increased with decreasing mode number.

Original languageEnglish (US)
Pages (from-to)128-132
Number of pages5
JournalOptics Communications
Issue number2
StatePublished - Aug 15 1990
Externally publishedYes


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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