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Dual-comb spectroscopy with Si3N4 waveguides for gas spectroscopy in the 2 μm – 2.5 μm water window

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Abstract

Dual-comb spectroscopy of CO and CO2 is reported in the important 2-2.5 μm atmospheric transparency window, using broadening in tailored Si3N4 waveguides and extending beyond Si-based fibers’ transparency window.

© 2019 The Author(s)

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