Article

Harvard researchers have created a novel method for generating optical frequency combs on a chip-scale platform using thin-film lithium niobate. The design overcomes challenges in microcomb generation by suppressing Raman scattering through a rotated racetrack resonator.

This development enables the production of stable soliton states and normal-dispersion Kerr microcombs, enhancing efficiency and operational wavelengths. The hybrid microcomb achieved offers broader spectral coverage, useful for spectroscopy and sensing applications.

The research emphasizes the importance of thin-film lithium niobate for integrated photonics, supported by funding from the Air Force Office of Scientific Research, National Science Foundation, and Department of Defense. The findings were published in Science Advances.