Towards a compact instrument to measure the volatile metabolites with submillimeter spectroscopy

François Bondu (1)

1 FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON

٥ Large range of accessible frequencies  molecule diversity ٥ With optical telecommunication components ٥ Rotation-vibration resonances of whole molecules ٥ Resonances specific of molecular species ٥ Resonances (width~100 kHz) clearly distinct, contrary to IR spectroscopy ٥ No heating, no ionization: molecule integrity ٥ Prefers liquid phase sampling for solute molecules at room temperature and pressure ٥ Measurement at low pressure (< 1 mbar) ٥ lots of molecules not in HITRAN/JPL/CDMS databases Scientific case Instrument properties First results on wave synthesis Submillimeter spectroscopy ٥ One laser diode wavelength stabilization Modeling (non-linear) phase and amplitude noise effects in cell transmission: Signal to noise depends on integration time, line strength, cell length… sub-ppm detectability seems achievable Conclusion and outlook

Domaines: Bactériologie; Ecosystèmes; Maladies infectieuses; Ingénierie des aliments; Instrumentations et Détecteurs [physics.ins-det]; Optique / photonique

François Bondu. Towards a compact instrument to measure the volatile metabolites with submillimeter spectroscopy. Microbial Spoilers in Food 2017, Jun 2017, Quimper, France. ⟨hal-01622232⟩