Racetrack-shaped lasers developed for bright, stable frequency combs

March 31, 2026 Harvard John A. Paulson School of Engineering and Applied Sciences

Harvard + TU Wien Researchers

Racetrack-Shaped Microchip Design

100x Improvement Stability gain

Microchip laser footprint

100x frequency stability

Researchers at Harvard and TU Wien built tiny, racetrack-shaped lasers that could shrink a precision spectrometer tool onto a microchip.