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https://research.ibm.com/publications/integrated-waveguide-amplifiers-for-optical-backplanes--1 Integrated waveguide amplifiers for optical backplanes for CLEOPR 2011 - IBM Research Integrated waveguide amplifiers for optical backplanes for CLEOPR 2011 by Jing Yang et al. waveguide amplifiers ibm research integrated optical backplanes https://orbit.dtu.dk/en/publications/planar-waveguide-amplifiers-and-laser-in-erbium-doped-silica/ Planar waveguide amplifiers and laser in erbium doped silica - Welcome to DTU Research Database waveguide amplifiers welcome to research database planar laser