Multispecies gas detection using mid-infrared open-path Fourier transform and upconversion spectroscopy.

Area of Science:

• Spectroscopy
• Environmental Science
• Optical Engineering

Background:

• Open-path spectroscopy is crucial for environmental monitoring and industrial safety.
• A single broadband mid-infrared supercontinuum (SC) source can potentially drive multiple spectroscopic techniques.

Purpose of the Study:

• To present and compare two distinct open-path spectroscopy configurations.
• To evaluate their performance using a shared SC source for diverse applications.

Main Methods:

• Utilized a broadband mid-infrared supercontinuum (SC) source.
• Employed two types of spectrometers: Fourier transform spectroscopy and upconversion spectroscopy.
• Evaluated performance in atmospheric gas monitoring and stand-off evaporation detection.

Main Results:

• Demonstrated two distinct open-path spectroscopy configurations with varying performance characteristics.
• Showcased the versatility of a single SC source for different spectroscopic methods.
• Successfully applied the techniques to atmospheric gas analysis and remote sensing.

Conclusions:

• The presented configurations offer complementary performance for open-path spectroscopy.
• A shared SC source is effective for diverse spectroscopic applications in environmental monitoring.
• Open-path spectroscopy shows promise for real-time pollution monitoring and leak detection.