©CEA - Paper at Photonics West to Present Detector that Could Cost 10x Less Than Existing Systems and Prompt Widespread Use of the Technology SAN FRANCISCO - Feb. Leti, an institute of CEA-Tech, has developed a photoacoustic spectroscopy technology for monitoring dangerous chemical emissions and traces of gas that could reduce the cost and the size these systems by a factor of 10 or more compared to existing tools. To be presented in an invited paper at Photonics West 2020 titled "Micro PA detector: pushing the limits of mid-IR photoacoustic spectroscopy integrated on silicon", the detector also provides high immunity to external noise and high sensitivity and selectivity. Photoacoustic (PA) spectroscopy is one of the most sensitive techniques available for monitoring dangerous chemical emissions and traces of gas. Coupled with cascade lasers, this technology is used in a large number of application fields, from industrial control to emission monitoring and biomedical analyses. But mass production and widespread use of such systems will require smaller footprints and lower manufacturing costs. Over the past six years, CEA-Leti has developed different versions of miniaturized photoacoustic cells and demonstrated the detection of gas traces with a tiny silicon based-PA cell.
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