Ultrasensitive photoacoustic sensor based on quantum cascade laser spectroscopy

作者：Kumar Deepak; Gautam Surya; Kumar Subodh; Gupta Saurabh; Srivastava Hari B; Thakur Surya N; Sharma Ramesh C^*

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2017, 176: 47-51.

DOI：10.1016/j.saa.2016.11.036

• Quantum cascade laser spectroscopy
• I R spectroscopy
• Photoacoustic sensor
• Resonant photoacoustic cell one side open
• Lock-in amplifier card
• Mixture of explosive trace detection
• COMSOL software

The paper focuses on development of ultra-sonic detection system based on laser photoacoustic spectroscopic technique and processing of signal for detection of very low quantity chemicals, explosive materials, and mixtures of these hazardous molecules. The detection system has been developed for the first time with specially designed one side open photo-acoustic cell having high quality factor. Explosive and Hazardous materials like RDX, DNT, PETN, Gun Powder, TATP (Tri acetone tri-peroxide) and their simulants like Acetone were detected in 7 to 9 pm wavelength band. Lock in amplifier electronic instrument was used for the detection of hazardous chemicals and mixture of explosives in very low quantity. Detection limit of the photoacoustic ultrasonic sensor was also carried out of powder, liquid and adsorbed on surfaces.

• 出版日期2017-4-5