All-diode-laser ultra-violet absorption spectroscopy and temporal gas correlation spectroscopy

• Here, we present a scheme producing UV radiation around 302 nm by sum-frequency generation in beta-barium borate employing a blue and a near-infrared diode laser. The diode-laser-based spectrometer has a mode-hop-free tuning range of 50 GHz and can be used for high-resolution spectroscopic detection of sulfur dioxide. Differential measurements of several sulfur dioxide gas concentrations, at low pressure as well as at ambient atmospheric pressure, are demonstrated. A particularly interesting aspect of the mixing scheme, is that the near-infrared and blue radiation can be tuned to absorption features of water and nitrogen dioxide, respectively

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Nyckelord

ambient atmospheric pressure

sulfur dioxide gas concentration

high-resolution spectroscopic detection

mode-hop-free tuning range

diode-laser-based spectrometer

near-infrared diode laser

beta-barium borate

sum-frequency generation

UV radiation

all-diode-laser ultra-violet absorption spectroscopy

temporal gas correlation spectroscopy

blue radiation

water

nitrogen dioxide

BBO

SO2

NO2

BaB2O4

Publikations- och innehållstyp

kon (ämneskategori)

ref (ämneskategori)