A smoothly tunable 1.432 μm Nd:YAlO3 laser was assembled for potential remote sensing of atmospheric CO2 at high altitudes. Continuous laser tuning from 6982.8 to 6984.6 cm-1 was demonstrated, and CO2 absorption lines relatively free of atmospheric water absorption interference at 6983 and 6984 cm-1 were experimentally observed, confirming feasibility of atmospheric CO2 sensing
