Mid-infrared dual-comb spectroscopy with interband cascade lasers.
Opt Lett
; 44(8): 2113-2116, 2019 Apr 15.
Article
en En
| MEDLINE
| ID: mdl-30985824
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 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 â¼100 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.
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01-internacional
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MEDLINE
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En
Revista:
Opt Lett
Año:
2019
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Article