title: Hyperspectral imaging of gases with a continuous-wave pump-enhanced optical parametric oscillator.
abstract: We demonstrate a system for the active real-time hyperspectral imaging of gases using a combination of a compact, pump-enhanced, continuous-wave optical parametric oscillator as an all-solid-state mid-infrared source of coherent radiation and an electro-mechanical polygonal imager. The wide spectral coverage and high spectral resolution characteristics of this source means that the system is capable of being selectively tuned into the absorption features of a wide variety of gaseous species. As an example we show how the largest absorption coefficient exhibited by methane at 3057.7cm(-1) can be accessed (amongst others) and gas plumes imaged in concentrations as low as 30ppm.m using a parametric oscillator based on periodically-poled RbTiOAsO(4) (PP-RTA).
authors.forename: David
authors.initials: D
authors.lastname: Stothard
authors.forename: Malcolm
authors.initials: M
authors.lastname: Dunn
authors.forename: Cameron
authors.initials: C
authors.lastname: Rae