1. O. Witzel, A. Klein, C. Meffert, S. Wagner, S. Kaiser, C. Schulz, V. Ebert, VCSEL-based, high-speed, in situ TDLAS for in-cylinder water vapor measurements in IC engines. Opt. Express, 21, 19951–19965 (2013) (Optical Society of America)
2. X. Chao, J.B. Jeffries, R.K. Hanson, Wavelength modulation spectroscopy for real-time, in situ NO detection in combustion gases with a 5.2 $$\upmu \,{\text{m}}$$ quantum cascade laser. Appl. Phys. B 106, 987–997 (2012)
3. A. Hangauer, J. Chen, R. Strzoda, M. Fleischer, M.-C. Amann, Performance of a fire detector based on a compact laser spectroscopic carbon monoxide sensor. Opt. Express, 22,13680–13690 (2014) (Optical Society of America)
4. L.C. Philippe R.K. Hanson, Laser diode wavelength-modulation spectroscopy for simultaneous measurement of temperature, pressure, and velocity in shock-heated oxygen flows. Appl. Opt. 32, 6090–6103 (1993) (Optical Society of America)
5. M.E. Webber, R. Claps, F.V. Englich, F.K. Tittel, J.B. Jeffries, R K. Hanson, Measurements of NH$$_{3}$$ and CO$$_{2}$$ with distributed-feedback diode lasers near 2.0 $$\upmu \,\text{ m }$$ in bioreactor vent gases. Appl. Opt., 40, 4395–4403 (2001) (Optical Society of America)