Fabrication of submillimeter-radius optical waveguide bends with anisotropic and isotropic wet chemical etchants
- 1 January 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 8 (2) , 264-270
- https://doi.org/10.1109/50.47881
Abstract
Wet chemical etchants suitable for making GaAs/AlGaAs single-mode optical waveguide bends with radii as low as 300 mu m for excess bend losses of 1 dB/90 degrees and propagation losses as low as 1 dB/cm at lambda =1.5 mu m are described. Additional bend losses due to modal mismatch resulting from etchant anisotropy are investigated, and it is shown that in many cases such anisotropy does not limit bend performance.Keywords
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