Room temperature GaInAsSb/GaSb quantum well laser for tunable diode laser absorption spectroscopy around 2.35 mu m

Novel GaInAsSb/GaSb multiple quantum well lasers grown by molecular beam ep itaxy have successfully operated in continous wave around 2.35 mu m at room temperature. The temperature and current tuning properties have been chara cterised by tunable diode laser absorption spectroscopy. These optical prop erties allowed a wide spectral scan from 2.27 mu m to 7.36 mu m. Experiment s of gas absorption have been carried out in direct absorption measurements in continuous wave regime. From the point of view of trace gas analysis, w avelength modulation has been successfully performed at 19 degrees C around 2.36 mu m. An external cavity has then been added to the setup to obtain m onomodal emission. These appealing results are very attractive for portable low-cost and room temperature trace pollutants analysis.