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Massively parallel sensing of trace molecules with broadband mid-infrared subharmonic frequency combs

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Abstract

We use a pair of mutually-coherent frequency-divide-by-two (subharmonic) GaAs OPOs with instantaneous span 3.1–5.5µm to demonstrate fast acquisition of 350,000 mode-resolved spectral data points and perform parallel detection in a mixture of 22 molecular species.

© 2018 The Author(s)

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