Atmospheric CO2 sensing using Scheimpflug-lidar based on a 1.57-µm fiber source

Jim Larsson; Joakim Bood; Can T Xu; Xiong Yang; Robert Lindberg; Fredrik Laurell; Mikkel Brydegaard

doi:10.1364/OE.27.017348

Atmospheric CO₂ sensing using Scheimpflug-lidar based on a 1.57-µm fiber source

Opt Express. 2019 Jun 10;27(12):17348-17358. doi: 10.1364/OE.27.017348.

Authors

Jim Larsson, Joakim Bood, Can T Xu, Xiong Yang, Robert Lindberg, Fredrik Laurell, Mikkel Brydegaard

PMID: 31252945
DOI: 10.1364/OE.27.017348

Abstract

A molecular laser-radar system, based on the Scheimpflug principle, has been constructed and demonstrated for remote sensing of atmospheric CO₂ concentrations using Differential Absorption Lidar (DIAL) in the (30012←00001) absorption band. The laser source is a Continues Wave (CW) Distributed-FeedBack (DFB) diode laser seeding an Erbium-doped fiber amplifier, emitting narrowband (3 MHz) tunable radiation with an output power of 1.3 W at 1.57 µm. The laser beam is expanded and transmitted to the atmosphere. The atmospheric backscattered signal is collected with a Newtonian telescope and detected with a linear InGaAs array detector satisfying the Scheimpflug condition. We present range-resolved measurements of atmospheric CO₂ concentration from a test range of 2 km located in the city of Lund, Sweden. We discuss and provide scalable results for CO₂ profiling with the Scheimpflug-lidar method.