Healy, N., Sparks, J.R., Sazio, P.J.A., Badding, J.V. and Peacock, A.C.
Tapered silicon optical fibers
Optics Express, 18, (8), . (doi:10.1364/OE.18.007596).
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The tapering of silicon optical fibers is demonstrated using a fusion splicer. The silicon fibers are fabricated using a high pressure chemical deposition technique to deposit an amorphous silicon core inside a silica capillary and the tapering is performed in a separate post-process. Optical and material characterization has revealed a smooth transition region leading to a uniform tapered waist that are both simultaneously crystallized to yield a solid polysilicon core. The strong mode confinement and low taper loss measured in the silicon fibers verifies this tapering approach for the fabrication of structures with nanoscale core dimensions.
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