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Compact and movable ozone differential absorption lidar system based on an all-solid-state, tuning-free laser source.
Optics Express
|May 15, 2020
Summary
This study introduces a compact, movable ozone differential absorption lidar (O3-DIAL) using a novel solid-state laser source. The system reliably measures vertical ozone profiles in the atmosphere, demonstrating its practical application.
Area of Science:
- Atmospheric Science
- Laser Spectroscopy
- Environmental Monitoring
Background:
- Differential absorption lidar (DIAL) is crucial for atmospheric gas detection.
- Existing DIAL systems can be bulky and require frequent tuning.
- Accurate measurement of tropospheric ozone is vital for air quality assessment.
Purpose of the Study:
- To develop a compact and movable ozone DIAL (O3-DIAL) system.
- To utilize an all-solid-state, tuning-free laser source for O3-DIAL.
- To demonstrate the system's capability for measuring vertical ozone profiles.
Main Methods:
- Employed solid-state stimulated Raman scattering for wavelength conversion in the lidar emitting source.
- Utilized a high repetition frequency Innoslab laser to pump SrWO4 crystals, generating yellow lasers.
- Achieved up to 70% light-to-light conversion efficiency.
Main Results:
- Successfully demonstrated the use of SrWO4 crystals as Raman frequency-shifting media.
- Obtained vertical profiles of tropospheric ozone within the Planetary Boundary Layer (PBL).
- Validated the reliability and stability of the compact, movable lidar system.
Conclusions:
- The developed O3-DIAL system is a suitable choice for measuring tropospheric ozone.
- Solid-state Raman scattering technology offers an efficient and practical approach for lidar development.
- The compact and movable design enhances the system's applicability in atmospheric monitoring.
