Open AccessMid-infrared dual-comb spectroscopy with interband cascade lasers
Author(s) -
Łukasz A. Sterczewski,
Jonas Westberg,
Mahmood Bagheri,
Clifford Frez,
I. Vurgaftman,
C. L. Canedy,
W. W. Bewley,
Charles D. Merritt,
Chul Soo Kim,
Mijin Kim,
J. R. Meyer,
Gerard Wysocki
Publication year - 2019
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.002113
Subject(s) - optics , materials science , laser , spectroscopy , optoelectronics , infrared , terahertz radiation , semiconductor laser theory , sensitivity (control systems) , broadband , semiconductor , physics , quantum mechanics , electronic engineering , engineering
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.