Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Petersen, Jan. C."'
Publikováno v:
Opt. Lett. 44, 5057-5060 (2019)
Raman spectroscopy is an appealing technique that probes molecular vibrations in a wide variety of materials with virtually no sample preparation. However, accurate and reliable Raman measurements are still a challenge and require more robust and pra
Externí odkaz:
http://arxiv.org/abs/1910.00381
Autor:
Christensen, Charles N., Zainchkovskyy, Yevgen, Barrera-Figueroa, Salvador, Torras-Rosell, Antoni, Marinelli, Giorgio, Sommerlund-Thorsen, Kim, Kleven, Jan, Kleven, Kristian, Voll, Erlend, Petersen, Jan C., Lassen, Mikael
Standard laser based fire detection systems are often based on measuring variation of optical signal amplitude. However, mechanical noise interference and loss from dust and steam can obscure the detection signal, resulting in faulty results or inabi
Externí odkaz:
http://arxiv.org/abs/1909.12389
We demonstrate the usefulness of a nanosecond pulsed single-mode mid-infrared (MIR) optical parametric oscillator (OPO) for Photoacoustic (PA) spectroscopic measurements. The maximum wavelength ranges for the signal and idler are 1.4 um to 1.7 um and
Externí odkaz:
http://arxiv.org/abs/1901.00471
Autor:
Lassen, Mikael, Balslev-Harder, David, Brusch, Anders, Pelevic, Nikola, Persijn, Stefan, Petersen, Jan C.
A photoacoustic (PA) sensor for fast and real-time gas sensing is demonstrated. The PA sensor is a standalone system controlled by a Field-Programmable Gate Array (FPGA). The PA cell has been designed for flow noise immunity using computational fluid
Externí odkaz:
http://arxiv.org/abs/1802.02879
A photoacoustic (PA) sensor for spectroscopic measurements of NO$_2$-N$_2$ at ambient pressure and temperature is demonstrated. The PA sensor is pumped resonantly by a nanosecond pulsed single-mode mid-infrared (MIR) optical parametric oscillator (OP
Externí odkaz:
http://arxiv.org/abs/1712.04547
Autor:
Petersen, Jan C., Lamard, Laurent, Feng, Yuyang, Focant, J-F., peremans, Andre, Lassen, Mikael
An innovative and novel quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for highly sensitive and selective breath gas analysis is introduced. The QEPAS sensor consists of two acoustically coupled micro-resonators (mR) with an off-axis 20 kH
Externí odkaz:
http://arxiv.org/abs/1704.07442
Autor:
Lassen, Mikael, Harder, David Baslev, Brusch, Anders, Nielsen, Ole Stender, Heikens, Dita, Persijn, Stefan, Petersen, Jan C.
We demonstrate an online (in-situ) sensor for continuous detection of oil contamination in compressed air systems complying with the ISO-8573 standard. The sensor is based on the photo-acoustic (PA) effect. The online and real-time PA sensor system h
Externí odkaz:
http://arxiv.org/abs/1612.04806
Publikováno v:
Optics Express 25, pp 5618-5625 (2017)
We demonstrate a compact and versatile laser system for stimulated Raman spectroscopy (SRS). The system is based on a tunable continuous wave (CW) probe laser combined with a home-built semi-monolithic nanosecond pulsed pump Nd:YVO4 laser at 1064 nm.
Externí odkaz:
http://arxiv.org/abs/1611.06252
Publikováno v:
Opt. Lett. 41, 4118-4121 (2016)
A trace gas sensor, based on quartz-enhanced photoacoustic spectroscopy (QEPAS), consisting of two acoustically coupled micro-resonators (mR) with an off-axis 20 kHz quartz tuning fork (QTF) is demonstrated. The complete acoustically coupled mR syste
Externí odkaz:
http://arxiv.org/abs/1608.03884
Publikováno v:
Optics Express Vol. 23, Issue 12, pp. 16320-16328 (2015)
We demonstrate sensitive high-resolution stimulated Raman measurements of hydrogen using a hollow-core photonic crystal fiber (HC-PCF). The Raman transition is pumped by a narrow linewidth (<50 kHz) 1064 nm continuous-wave (CW) fiber laser. The probe
Externí odkaz:
http://arxiv.org/abs/1506.04516