Mirror quality and the performance of reflective arrayed-waveguide grating multiplexers

A. A. Bernussi, L. Grave de Peralta, V. Gorbounov, J. A. Linn, S. Frisbie, R. Gale, H. Temkin

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


This paper discusses an investigation of the effects of mirror quality on the performance of reflecting arrayed-waveguide-grating multiplexers. Using specially designed external mirrors as external reflectors, the optimum flatness and microroughness of the reflecting surface are determined. The experiments discussed in the paper indicate that a reflecting-surface flatness of λ/4 is sufficient to obtain high-performance reflective multiplexers. Extrinsic mirror-related phase and intensity errors were found to be negligible for surfaces polished with diamond lapping films with a grain size smaller than 1 μm. These experimental results were found to be in excellent agreement with simulations based on mirror-related changes in the waveguide-grating-length increment.

Original languageEnglish
Pages (from-to)1828-1832
Number of pages5
JournalJournal of Lightwave Technology
Issue number7
StatePublished - 2004


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