Tear fluid is emerging as an attractive source of diagnostic information because it can be collected easily and noninvasively ...

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Andreas Fichtner strips a cable of its protective sheath, exposing a glass core thinner than a hair — a fragile, 4-kilometer-long fiber that’s about to be fused to another. It’s a fiddly task better ...

Caltech scientists have developed a way to guide light on silicon wafers with low signal loss approaching that of optical ...