Remote atmospheric measurements of SO2 were performed using a differential absorption lidar with a continuously tunable LiNbO3 parametric oscillator and amplifier source in the 4.0-µm region. A comparison of injected gas concentration in a remotely located sample chamber with the lidar measurements through the chamber showed measurement agreement within experimental error and a detection sensitivity for SO2 of 0.9 part in 106 km.
© 1978 Optical Society of America
Richard A. Baumgartner and Robert L. Byer, "Remote SO2 measurements at 4 µm with a continuously tunable source," Opt. Lett. 2, 163-165 (1978)