Diode laser spectroscopy using two modes of an InAsSb/InAsSbP laser near 3.6 mu m

A new type of multimode semiconductor laser, based on InAsSb/InAsSbP hetero structures, is described. This continuous laser working in a broad range of temperatures (30-100 K) was rested using a closed-cycle He-cryostat and it s quality was demonstrated using the laser spectroscopy of gases absorbing in the 2800 cm(-1) region. Two different laser modes were used to increase the spectral range. The spectral characteristics and tunability of the lase r were explored as a function of heat-sink temperature and drive current wi th the aim of developing its use for high-resolution spectroscopy. The lase r has potential applications in the field of chemistry, atmospheric researc h and the study of the kinetics of reactive species.