Harvard Researchers Develop Advanced Micro-Combs Using Thin-Film Lithium Niobate
Researchers at Harvard's John A. Paulson School of Engineering have developed a method to create ultra-precise optical frequency combs on a chip using thin-film lithium niobate. This innovation addresses challenges in microcomb generation by suppressing Raman scattering, leading to broader and more versatile frequency combs. The hybrid microcomb achieved demonstrates increased spectral coverage, enhancing applications in optical communications, spectroscopy, and sensing. The study, published in Science Advances, highlights the potential of thin-film lithium niobate in integrated photonics.
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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.
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