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Development and characterization of a laboratory setup for photoacoustic NO 2 determination based on the excitation of electronic 2 B 2 and 2 B 1 states using a low-cost semiconductor laser

Rück, Thomas ; Bierl, Rudolf ; Matysik, Frank-Michael



Abstract

This work gives a detailed characterization of a laboratory setup for photoacoustic NO2 trace gas detection at the ppb level. The signal generation is based on the excitation of electronic B-2(2) and B-2(1) states using a low-cost semiconductor laser emitting at 450 nm. An acoustic resonator was used for signal amplification and the modulation frequency of the laser was determined to 3395 Hz in ...

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