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Proceedings Article

Interband cascade laser sources in the mid-infrared for green photonics

[+] Author Affiliations
J. Koeth, M. von Edlinger, J. Scheuermann, S. Becker, L. Nähle, M. Fischer

nanoplus GmbH (Germany)

R. Weih, M. Kamp, S. Höfling

Julius-Maximilians-Univ. Würzburg (Germany)

Proc. SPIE 9767, Novel In-Plane Semiconductor Lasers XV, 976712 (March 10, 2016); doi:10.1117/12.2212644
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From Conference Volume 9767

  • Novel In-Plane Semiconductor Lasers XV
  • Alexey A. Belyanin; Peter M. Smowton
  • San Francisco, California, United States | February 13, 2016

abstract

Tunable Laser Absorption Spectroscopy (TLAS) has proven to be a versatile tool for gas sensing applications with significant advantages compared to other techniques. These advantages include real time measurement, standoff detection and ruggedness of the sensor. Especially the Mid-Infrared (MIR) wavelength region from 3 to 6 microns is of great interest for industrial process control and the reduction of pollutants. In this contribution we present novel ICL devices developed to address the crucial air pollutant sulfur dioxide SO2 at its transition around 4 μm. In general, interband cascade lasers (ICLs) have evolved into important laser sources for the MIR spectral range. Compared to quantum cascade lasers, they offer significant advantages with respect to threshold power density as well as overall power consumption. In contrast to conventional diode lasers, ICLs are able to cover the entire MIR wavelength range of interest. For application in TLAS, single-mode devices are required. In this work application-grade distributed feedback (DFB) ICL devices for addressing SO2 at the wavelength range around 4 μm are presented. A lateral metal grating, defined by electron beam lithography, is used to achieve DFB operation and hence spectrally single-mode emission. Continuous wave laser operation with threshold power consumption below 100 mW at room temperature, side mode suppression ratio of > 30 dB and wavelength tuning range up to 28 nm are demonstrated. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

J. Koeth ; M. von Edlinger ; J. Scheuermann ; S. Becker ; L. Nähle, et al.
" Interband cascade laser sources in the mid-infrared for green photonics ", Proc. SPIE 9767, Novel In-Plane Semiconductor Lasers XV, 976712 (March 10, 2016); doi:10.1117/12.2212644; http://dx.doi.org/10.1117/12.2212644


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