A group of researchers at the California Institute of
Technology (Caltech) has created the optical equivalent of a tuning fork—a
device that can help steady the electrical currents needed to power high-end
electronics and stabilize the signals of high-quality lasers. The work marks
the first time that such a device has been miniaturized to fit on a chip and
may pave the way to improvements in high-speed communications, navigation, and
remote sensing.