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30 April 2004Compact integrated waveguide turning mirror in SOI
Planar lightwave circuits based on silicon are playing important roles in integrated optical systems. The integrated waveguide turning mirror (IWTM) is essential component for the compactness of optical devices. We designed and fabricated an integrated waveguide turning mirror with a 90° directional change in SOI. The mirror was etched by induct-coupled-plasma etching (ICP) first. Then the surface was enhanced by wet anisotropic etching. This two-step process introduced a compact IWTM with smooth and vertical surface. Compared with the mirror fabricated by wet anisotropic etching only, the mirror fabricate by the two-step process is better to meet the requirement of compact design.