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Single-mode interband cascade laser multiemitter structure for two-wavelength absorption spectroscopy
Author(s): Julian Scheuermann; Robert Weih; Steffen Becker; Marc Fischer; Johannes Koeth; Sven Höfling
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Paper Abstract

An interband cascade laser multiemitter with single-mode distributed feedback (DFB) emission at two wavelengths is presented. Continuous-wave laser operation is measured from 0°C to 40°C with threshold currents of around 25 mA and output powers of around 9 mW at 20°C. The ridge waveguide DFB structures are monolithically integrated with a spacing of 70  μm and each is provided with an individual metal DFB grating to select specific single-mode wavelengths of interest for absorption spectroscopy. The emission windows at 3.92 and 4.01  μm are targeting hydrogen sulfide and sulfur dioxide, which are of importance for industrial applications since both gases are reagents of the Claus process in sulfur recovery units, recovering elemental sulfur from gaseous hydrogen sulfide.

Paper Details

Date Published: 11 September 2017
PDF: 5 pages
Opt. Eng. 57(1) 011008 doi: 10.1117/1.OE.57.1.011008
Published in: Optical Engineering Volume 57, Issue 1
Show Author Affiliations
Julian Scheuermann, nanoplus Nanosystems and Technologies GmbH (Germany)
Robert Weih, nanoplus Nanosystems and Technologies GmbH (Germany)
lius-Maximilians-Univ Würzburg (Germany)
Steffen Becker, nanoplus Nanosystems and Technologies GmbH (Germany)
Marc Fischer, nanoplus Nanosystems and Technologies GmbH (Germany)
Johannes Koeth, nanoplus Nanosystems and Technologies GmbH (Germany)
Sven Höfling, Julius-Maximilians-Univ. Würzburg (Germany)
Univ. of St. Andrews (United Kingdom)

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