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arXiv · 1510.09158

On-chip Dual-comb based on Quantum Cascade Laser Frequency Combs

Gustavo Villares·Johanna Wolf·Dmitry Kazakov·Martin J Süess·Andreas Hugi·Mattias Beck·Jérôme Faist
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Abstract

Dual-comb spectroscopy is emerging as one of the most appealing applications of mid-infrared frequency combs for high-resolution molecular spectroscopy, as it leverages on the unique coherence properties of frequency combs combined with the high sensitivities achievable by mid-infrared molecular spectroscopy. Here we present an on-chip dual-comb source based on mid-infrared quantum cascade laser frequency combs, where two frequency combs are integrated on a single chip. Control of the combs repetition and offset frequencies is obtained by integrating micro-heaters next to each laser. We show that a full control of the dual-comb system is possible, by measuring a multi-heterodyne beating corresponding to an optical bandwidth of 32 cm$^{-1}$ at a center frequency of 1330 cm$^{-1}$ (7.52 $μ$m), demonstrating that this device is ideal for compact dual-comb spectroscopy systems.

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Gustavo Villares, Johanna Wolf, Dmitry Kazakov, Martin J Süess, Andreas Hugi, Mattias Beck, Jérôme Faist. 2015-10-30. On-chip Dual-comb based on Quantum Cascade Laser Frequency Combs. https://doi.org/10.1063/1.4938213

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