The PolySense team has just published a new article on Optics Express demonstrating an ultra-highly sensitive and robust CH4 sensor based on a 3.3 μm interband cascade laser and a low-noise differential photoacoustic (PAS) cell. With an integration time of 90 s, a detection limit of 0.6 ppb was achieved. No additional water or air laser Leggi di piùNew Publication on Optics Express[…]
The PolySense team has just published a new article on Optics Express demonstrating the possibility to use QTFs as photodetectors in a TDLAS sensor, exploiting the light induced thermo-elastic effect occurring when the laser light hits a QTF surface. In the best experimental conditions, QTF as light detector showed an SNR 6.5 times higher than that Leggi di piùNew Publication on Optics Express[…]
The PolySense team has just published a new article on Fuel – Elsevier reporting on the realization of a shoe-box sized quartz-enhanced photoacoustic spectroscopy system capable of: i) selective detection of methane and ethane in the parts-per-billion range, and propane in the parts-per-million range, by employing a single interband cascade laser ; ii) selective detection Leggi di piùNew Publication on Fuel – Elsevier[…]
The PolySense team has just published a new article on Sensors reporting on a the realization of a dual-gas sensor based on the combination of a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and an electronic hygrometer was realized for the simultaneous detection of methane (CH4) and water vapor (H2O) in air. The sensor was tested by Leggi di piùNew Publication on Sensors[…]
The PolySense team has just published a new article on Applied Science reporting on a study of the front-end electronics for quartz tuning forks (QTFs) employed as optoacoustic transducers in quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing. We demonstrated that the fully di erential voltage amplifier allows for a nearly doubled SNR with respect to the typically used single-ended Leggi di piùNew Publication on Applied Science[…]
The PolySense team has just published a new article on Applied Science reporting on the realization of a quartz-enhanced photoacoustic spectroscopy (QEPAS)-based ethane gas sensor operating in the near-IR and employing a pigtailed laser diode emitting at ~1684 nm as the exciting light source. The minimum ethane concentration detectable using a 100 ms lock-in integration time achieving Leggi di piùNew Publication on Applied Science[…]
The PolySense team has just published a new article on Applied Physics Letters reporting on an optical gas sensing technique based on in-plane quartz-enhanced photoacoustic spectroscopy (IP-QEPAS). IP-QEPAS sensor results in a signal more than 40 times higher than that measured with the standard in-plane QEPAS configuration, confirming the potentiality of this approach. The following Leggi di piùNew Publication on Applied Physics Letters[…]
The PolySenSe Team has visited the THORLABS Headquarter to discuss future development exploiting the New Lab facility that will open soon @ the Physics department of Bari.
The PolySense team has just published a new article on Photoacoustics Journal reporting on a comparison between piezoelectric and interferometric readouts of vibrations in quartz tuning forks (QTFs) for quartz-enhanced photoacoustic (QEPAS) trace gas detection. The following link provide access to the article. http://polysense.poliba.it/wp-content/uploads/2020/01/113_Piezo-interferometric-QEPAS_Photoaocustics_2020.pdf
The PolySense team has just published a new article on Photoacoustics Journal reporting on multi-gas QEPAS detection of methane and nitrous oxide using a quantum cascade laser array. A methane detection sensitivity of 200 ppb and 60 ppb for nitrous oxide were achieved with a 10 s lock-in integration time. The following link provide access Leggi di piùNew Publication on Photoacoustics Journal[…]