TY - GEN
T1 - Atmospheric and environmental sensing by photonic absorption spectroscopy
AU - Chen, W.
AU - Wu, T.
AU - Zhao, W.
AU - Wysocki, Gerard
AU - Cui, X.
AU - Lengignon, C.
AU - Maamary, R.
AU - Fertein, E.
AU - Coeur, C.
AU - Cassez, A.
AU - Wang, Y.
AU - Zhang, W.
AU - Gao, X.
AU - Liu, W.
AU - Dong, F.
AU - Zha, G.
AU - Zheng, Xu
AU - Wang, T.
PY - 2013
Y1 - 2013
N2 - Chemically reactive short-lived species play a crucial role in tropospheric processes affecting regional air quality and global climate change. Contrary to long-lived species (such as greenhouse gases), fast, accurate and precise monitoring changes in concentration of atmospheric short-lived species represents a real challenge due to their short life time (∼1 s for OH radical) and very low concentration in the atmosphere (down to 10 6 molecules/cm3, corresponding to 0.1 pptv at standard temperature and pressure). We report on our recent progress in instrumentation developments for spectroscopic sensing of trace reactive species. Modern photonic sources such as quantum cascade laser (QCL), distributed feedback (DFB) diode laser, light emitting diode (LED), difference-frequency generation (DFG) parametric source are implemented in conjunction with highsensitivity spectroscopic measurement techniques for: (1) nitrous acid (HONO) monitoring by QCL-based long optical pathlength absorption spectroscopy and LED-based IBBCEAS (incoherent broadband cavity-enhanced absorption spectroscopy); (2) DFB laser-based hydroxyl free radical (OH) detection using WM-OA-ICOS (wavelength modulation off-axis integrated cavity output spectroscopy) and FRS (Faraday rotation spectroscopy), respectively; (3) nitrate radical (NO3) and nitrogen dioxide (NO 2) simultaneous measurements with IBBCEAS approach. Applications in field observation and in smog chamber study will be presented.
AB - Chemically reactive short-lived species play a crucial role in tropospheric processes affecting regional air quality and global climate change. Contrary to long-lived species (such as greenhouse gases), fast, accurate and precise monitoring changes in concentration of atmospheric short-lived species represents a real challenge due to their short life time (∼1 s for OH radical) and very low concentration in the atmosphere (down to 10 6 molecules/cm3, corresponding to 0.1 pptv at standard temperature and pressure). We report on our recent progress in instrumentation developments for spectroscopic sensing of trace reactive species. Modern photonic sources such as quantum cascade laser (QCL), distributed feedback (DFB) diode laser, light emitting diode (LED), difference-frequency generation (DFG) parametric source are implemented in conjunction with highsensitivity spectroscopic measurement techniques for: (1) nitrous acid (HONO) monitoring by QCL-based long optical pathlength absorption spectroscopy and LED-based IBBCEAS (incoherent broadband cavity-enhanced absorption spectroscopy); (2) DFB laser-based hydroxyl free radical (OH) detection using WM-OA-ICOS (wavelength modulation off-axis integrated cavity output spectroscopy) and FRS (Faraday rotation spectroscopy), respectively; (3) nitrate radical (NO3) and nitrogen dioxide (NO 2) simultaneous measurements with IBBCEAS approach. Applications in field observation and in smog chamber study will be presented.
KW - absorption spectroscopy
KW - distributed feedback (DFB) diode laser
KW - hydroxyl free radical (OH)
KW - light emitting diode (LED)
KW - nitrate radical (NO)
KW - nitrogen dioxide (NO)
KW - nitrous acid (HONO)
KW - quantum cascade laser (QCL)
UR - http://www.scopus.com/inward/record.url?scp=84875766284&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875766284&partnerID=8YFLogxK
U2 - 10.1117/12.2004803
DO - 10.1117/12.2004803
M3 - Conference contribution
AN - SCOPUS:84875766284
SN - 9780819494009
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Quantum Sensing and Nanophotonic Devices X
T2 - Quantum Sensing and Nanophotonic Devices X
Y2 - 3 February 2013 through 7 February 2013
ER -