Resonant optical power buildup inside a high finesse cavity is exploited to boost the sensitivity in quartz-enhanced photoacoustic spectroscopy (QEPAS) for CO, N2O and H2O detection, operating at a wavelength of 4.59 µm. A quartz tuning fork with T-shaped prongs optimized for QEPAS has been employed. Exploiting the high signal-to-noise ratio attainable with this tuning fork together with an optical power amplification of ~100 enabled by efficient optical feedback locking, limits of detection (3σ, 10 s integration) of 260 ppt and 750 ppt for CO and N2O have been reached.
Mid-Infrared Intracavity Quartz-Enhanced Photoacoustic Spectroscopy with pptv – Level Sensitivity Using a T-shaped Custom Tuning Fork / Hayden, Jakob; Giglio, Marilena; Sampaolo, Angelo; Spagnolo, Vincenzo; Lendl, Bernhard. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - ELETTRONICO. - (2022). [10.1016/j.pacs.2022.100330]
Mid-Infrared Intracavity Quartz-Enhanced Photoacoustic Spectroscopy with pptv – Level Sensitivity Using a T-shaped Custom Tuning Fork
Giglio, Marilena;Sampaolo, Angelo;Spagnolo, Vincenzo;
2022-01-01
Abstract
Resonant optical power buildup inside a high finesse cavity is exploited to boost the sensitivity in quartz-enhanced photoacoustic spectroscopy (QEPAS) for CO, N2O and H2O detection, operating at a wavelength of 4.59 µm. A quartz tuning fork with T-shaped prongs optimized for QEPAS has been employed. Exploiting the high signal-to-noise ratio attainable with this tuning fork together with an optical power amplification of ~100 enabled by efficient optical feedback locking, limits of detection (3σ, 10 s integration) of 260 ppt and 750 ppt for CO and N2O have been reached.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
