Spectral filtering for the CO2 laser path to reduce interference.

Probing the mid-infrared absorption spectra with rapid tuning and broad scanning capabilities.

Detecting laser intensity for absorption measurements, used for common-mode rejection and wavelength reference.

Monitoring concentration of methanol during high-temperature tests with fixed wavelength operation.

Creating high-temperature and high-pressure environments for spectroscopic measurements using shock waves.

Measuring pressure rise to trigger data acquisition and calculate shock conditions.

Splitting the laser beam for multiple detection paths.

Providing optical access to the shock tube with anti-reflection coating to minimize losses.

Holding reference gases for wavelength calibration.

Spatial filtering to reduce beam size and improve signal quality.

Attenuating laser intensity to prevent detector saturation.