Ge-capped SiGe core optical fibers
Journal article, Peer reviewed
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Original versionOptical Materials Express. 2019, 9 (11), 4301-4306. https://doi.org/10.1364/OME.9.004301
CO2 laser processing offers the possibility to inscribe structures within glass-clad SiGe-core fibers by altering the spatial distribution of the Si and Ge. Spatial segregation of Ge to the end of a fiber is shown via optical transmission measurements to alter the local bandgap, and the curved end of the fiber focuses the output of a multimode fiber. Scalable fabrication is demonstrated using a commercial CO2 laser engraver for processing of arrays.