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Optical Ruler’s Expanded Frequencies Support Precision Navigation

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GAITHERSBURG, Md., March 11, 2022 — Researchers at the National Institute of Standards and Technology (NIST) expanded by nearly two-thirds the frequency range over which a chip-scale device can accurately generate and measure the oscillations of lightwaves. The expanded range of the system, a micro-ring resonator frequency comb (microcomb), could lead to better sensors of greenhouse gases and may also improve global navigation systems. The microcomb consists of a miniature, rectangular waveguide — a channel that confines lightwaves — coupled to a ring-shaped resonator about 50 µm in diameter. Laser light...Read full article

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