Mid-infrared dual-comb spectroscopy with an optical parametric oscillator

Abstract

We present the first implementation of mid-infrared dual-comb spectroscopy with an optical parametric oscillator. Methane absorption spectroscopy was demonstrated with a resolution of $0.2{\mathrm{cm}}^{-1}$ (5 GHz) at an acquisition time of $\sim 10.4\mathrm{ms}$ over a spectral coverage at $2900–3050{\mathrm{cm}}^{-1}$. The average power from each individual mid-infrared comb line was $\sim 1\mathrm{\mu W}$, representing a power level much greater than typical difference-frequency-generation sources. Mid-infrared dual-comb spectroscopy opens up unique opportunities to perform broadband spectroscopic measurements with high resolution, high requisition rate, and high detection sensitivity.

© 2013 Optical Society of America

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