Scattering loss of antiresonant reflecting optical waveguides
- 1 May 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 9 (5) , 590-597
- https://doi.org/10.1109/50.79535
Abstract
Scattering loss of two-dimensional ARROW-type waveguides, i.e., antiresonant reflecting optical waveguide (ARROW) and ARROW-B, is analyzed by the first-order perturbation theory. Calculated results are compared with those of conventional three-layer waveguides. Optimum design for the reduction of scattering loss of these ARROW-type waveguides is discussed. It was found that the scattering loss of ARROW-type waveguides is no larger than that of a conventional waveguide having a relative refractive-index difference Δ of 2.5%, despite each interface of ARROW-type waveguides has a large Δ, normally larger than 20%. The optimum design for the reduction of essential radiation loss of ARROW is also optimum for the reduction of scattering loss. As for ARROW-B, both scattering loss and radiation loss are small enough, even though some highindex material like polycrystalline glasses and semiconductors are adopted for the coreKeywords
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