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arXiv · 1812.11175

Mid-infrared dual-comb spectroscopy with low drive-power on-chip sources

Lukasz A. Sterczewski·Jonas Westberg·Mahmood Bagheri·Clifford Frez·Igor Vurgaftman·Chadwick L. Canedy·William W. Bewley·Charles D. Merritt·Chul Soo Kim·Mijin Kim·Jerry R. Meyer·Gerard Wysocki
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Abstract

Two semiconductor optical frequency combs consuming less than 1 W of electrical power are used to demonstrate high-sensitivity mid-infrared dual-comb spectroscopy in the important 3-4 $\mu$m spectral region. The devices are 4 millimeters long by 4 microns wide, and each emits 8 mW of average optical power. The spectroscopic sensing performance is demonstrated by measurements of methane and hydrogen chloride with a spectral coverage of 33 cm$^{-1}$ (1 THz), 0.32 cm$^{-1}$ (9.7 GHz) frequency sampling interval, and peak signal-to-noise ratio of ~100 at 100 $\mu$s integration time. The monolithic design, low drive power, and direct generation of mid-infrared radiation are highly attractive for portable broadband spectroscopic instrumentation in future terrestrial and space applications.

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Lukasz A. Sterczewski, Jonas Westberg, Mahmood Bagheri, Clifford Frez, Igor Vurgaftman, Chadwick L. Canedy, William W. Bewley, Charles D. Merritt, Chul Soo Kim, Mijin Kim, Jerry R. Meyer, Gerard Wysocki. 2018-11-20. Mid-infrared dual-comb spectroscopy with low drive-power on-chip sources. https://arxiv.org/abs/1812.11175

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