title: A difference frequency generation spectrometer and its detection of atmospheric N2O.
abstract: The paper reports the realization and characterization of a difference frequency generation spectrometer using periodically poled lithium niobate (PPLN) crystal. The pump and signal laser we used is a Ti:sapphire ring laser and a diode pumped monolithic Nd:YAG laser, respectively. The continuous wave (cw) infrared radiation from 2.8 to 4.8 microm has been generated. The idler radiation can be used to study fundamental absorption bands of molecules and trace gas detection. In this work, we report the detection of nitrous oxide (N(2)O) in atmosphere, the minimum detectable concentration of 10.9 ppbV was achieved using a Herriott cell with the optical path length of 100 m.
authors.affiliation: Laboratory of Atmospheric Optics of Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Zhensong
authors.initials: Z
authors.lastname: Cao
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Gao
authors.forename: Lunhua
authors.initials: L
authors.lastname: Deng
authors.forename: W D
authors.initials: WD
authors.lastname: Chen
authors.forename: Yiqian
authors.initials: Y
authors.lastname: Yuan
authors.forename: Weijun
authors.initials: W
authors.lastname: Zhang
authors.forename: Zhiben
authors.initials: Z
authors.lastname: Gong
mesh_terms: D000388:Air; D000393:Air Pollutants / Q000032:analysis*; D000537:Aluminum Oxide / Q000737:chemistry; D001272:Atmosphere; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D005740:Gases; D007259:Infrared Rays; D007834:Lasers; D015233:Models, Statistical; D009556:Niobium / Q000737:chemistry; D009609:Nitrous Oxide / Q000032:analysis* / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D013053:Spectrophotometry / Q000295:instrumentation* / Q000379:methods*; D014025:Titanium / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D005740:Gases; D010087:Oxides; D009556:Niobium; C091692:lithium niobate; D014025:Titanium; D009609:Nitrous Oxide; D000537:Aluminum Oxide