8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-523-C7-526
Photoacoustic spectroscopy on gases with high pressure continuously tunable CO2 laserP. Repond and M.W. Sigrist
ETH Zurich, Institute of Quantum Electronics, 8093 Zurich, Switzerland
We present a novel photoacoustic detection system with a high pressure CO2 laser as radiation source. The laser is continuously tunable across wavelength ranges from 13 cm-1 to 18 cm-1 wide. The narrow bandwidth of 0.017 cm-1 allows to resolve any fine structure in the absorption spectra of trace gases at atmospheric pressure. The absorption spectra of four gases are reported, demonstrating the great potential improvement in detection selectivity.
© EDP Sciences 1994