this post was submitted on 19 Feb 2026
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Physics

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A Micro-Comb is when Jeffrey Combs only plays that character for one episode.

Optical frequency combs are laser sources whose colors are evenly spaced, like the teeth of a comb. They underpin many modern technologies requiring precision measurement, from atomic clocks to high-speed telecommunications. A landmark invention in optics and the subject of the 2005 Nobel Prize in Physics, conventional fiber-laser frequency combs are stable and reliable but can be limited by bulk and expense.

The Lončar lab is at the forefront of creating chip-scale optical frequency combs, or microcombs, by shrinking these laser sources to micron-sized photonic circuits. These microcombs offer many advantages, including requiring less power and having larger comb-line spacings suited for carrying high-bandwidth data.

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