WASHINGTON, Oct. 17 -- The U.S. Department of Commerce's National Institute of Standards & Technology issued the following press release:

Microcombs, which act as miniature rulers for light, are fabricated on wafers like the one shown here. Each wafer contains more than 400 chips, with each chip housing up to 300 tiny ring-shaped resonators that form the heart of the new microcomb technology. Researchers at the National Institute of Standards and Technology (NIST) and their colleagues have demonstrated a new way to generate a miniature tape measure for light. Unlike previous designs, it can make high-quality optical measurements without needing to be tethered to bulky laboratory equipment. The new device could help revolutionize ultrapreci...