Lowest microwave noise ever observed on photonics chip demonstrated
A schematic of the photonic integrated chip, developed by the Gaeta lab, for all-optical optical frequency division – a method of converting a high-frequency signal to a lower frequency (image: Yun Zhao/Columbia Engineering)
The new technique of optical frequency division without the need for electronics provides a pathway towards small-footprint ultra-low-noise microwave generation for applications such as high-speed communication, atomic clocks, and autonomous vehicles
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