WASHINGTON, June 19 [Category: Medical] -- Optica, formerly the Optical Society, posted the following news release: * * * Researchers demonstrate precise optical clock signal transmission via multicore fiber * Experiment shows how high-capacity fibers can stably carry optical clock signals alongside telecom traffic, advancing precision timekeeping applications  Researchers have shown, for the first time, that transmission of ultrastable optical signals from optical clocks across tens of ki  more