1. Millimeter-scale chip-based supercontinuum generation

    Millimeter-scale chip-based supercontinuum generation

    In optics, when a collection of nonlinear processes act together on a pump beam, the resulting spectral broadening of the original pump beam gives rise to a supercontinuum . Supercontinuum sources for optical coherence tomography are of great interest since they provide a broad bandwidth for high resolution and high-power imaging sensitivity. For commercial fiber-based supercontinuum systems, researchers use high pump powers to generate a broad bandwidth and customized optical filters to modulate the spectra. In a new report now published on Science Advances , Xingchen Ji and a research team in electrical engineering, biomedical engineering and applied physics at the Columbia ...

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