Abstract
A tunable diode laser absorption spectroscopy device was developed to study atmospheric propagation for emerging high-energy laser weapons. The cesium diode-pumped alkali laser operates near 895nm in the vicinity of several water-vapor absorption lines. Temperature, pressure, and water vapor concentration were determined for 150m and 1km open paths with statistical errors of ∼0.2%. Comparison with meteorological instruments yields agreement for the 1km path to within 0.6% for temperature, 3.7% for pressure, and 2.4% for concentration.
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