Mid-infrared dual-comb spectroscopy with interband cascade lasers

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

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


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 μm spectral region. The devices are 4 mm long by 4 μm wide, and each emits 8 mW of average optical power. The spectroscopic sensing performance is demonstrated by measurements of methane and hydrogen chloride with optical multi-pass cell sensitivity enhancement. The system provides 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 μs 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.

Original languageEnglish (US)
Pages (from-to)2113-2116
Number of pages4
JournalOptics Letters
Issue number8
StatePublished - Apr 15 2019

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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