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

Area of Science:

• Atmospheric Science
• Optical Remote Sensing
• Spectroscopy

Background:

• Accurate monitoring of atmospheric carbon dioxide (CO2) is crucial for climate change research.
• Differential Absorption Lidar (DIAL) is a powerful technique for remote sensing of atmospheric gases.
• The Scheimpflug principle offers advantages in optical system design for lidar applications.

Purpose of the Study:

• To construct and demonstrate a novel molecular laser-radar system for atmospheric CO2 sensing.
• To utilize the Scheimpflug principle for enhanced lidar performance.
• To achieve range-resolved measurements of CO2 concentrations.

Main Methods:

• A Continuous Wave (CW) Distributed-Feedback (DFB) diode laser seeded an Erbium-doped fiber amplifier, emitting tunable 1.57 µm radiation.
• A Newtonian telescope collected backscattered signals, detected by a linear InGaAs array detector.
• The Scheimpflug condition was implemented in the optical detection system.

Main Results:

• The system successfully performed range-resolved measurements of atmospheric CO2 concentration.
• Measurements were conducted over a 2 km test range in Lund, Sweden.
• Scalable results for CO2 profiling using the Scheimpflug-lidar method were obtained.

Conclusions:

• The demonstrated Scheimpflug-lidar system is effective for remote sensing of atmospheric CO2.
• The system provides valuable data for atmospheric CO2 profiling.
• This technology offers a scalable solution for environmental monitoring.