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Composite optical fiber
An SEM micrograph of the cross-section of the hybrid fibre with 800 micron hollow core, omnidirectional mirror layers, metallic filament array and polymer cladding. The inset shows eight pairs of quarter-wave arsenic-selenium/PEI multilayers and one of the metallic, tin filaments in the ring that is surrounding the mirror layers (image credit: Nature 431 826).
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