Design Optimization of a Photoacoustic System for Gas Detection in Exhaled Breath

• Abstract:

  Exhaled breath analysis is a promising non-invasive approach for detecting disease-related biomarkers, including nitrogen dioxide (NO₂), which is associated with airway inflammation. A compact photoacoustic spectroscopy (PAS) system was developed using a 405 nm LED source and a resonant acoustic chamber optimized for NO₂ detection. Focused optical excitation enhances localized absorption, generating an acoustic signal detected by a MEMS microphone. The system demonstrated a good response to 50 ppm gas variation, supporting its suitability for low-cost breath analysis applications.
• Download:

  IMEKO-TC2-2025-004.pdf
• DOI:

  tc2-2025.004

Event details:

• IMEKO TC:

  TC2
• Event name:

  IMEKO TC2 PhotoMet 2025
• Title:

  2025 IMEKO TC2 International Symposium on Modern Photonic Metrology

  PhotoMet 2025 - Shaping the Future of Photonic Metrology

• Place:

  Modena, ITALY
• Time:

  1 September 2025 - 3 September 2025