title: Absolute linearity measurements on a gold-black-coated deuterated L-alanine-doped triglycine sulfate pyroelectric detector.
abstract: The nonlinearity characteristics of a commercially available deuterated L-alanine-doped triglycine sulfate (DLATGS) pyroelectric detector were experimentally investigated at high levels of illumination using the National Physical Laboratory detector linearity characterization facility. The detector was shown to exhibit a superlinear response at high levels of illumination. Moreover, the linearity factor was shown to depend on the area of the spot on the detector active area being illuminated, i.e., the incident irradiance. Possible reasons for the observed behavior are proposed and discussed. The temperature coefficient of the response of the DLATGS pyroelectric detector was measured and found to be higher than +2.5% degrees C(-1). This large and positive temperature coefficient of response is the most likely cause of the superlinear behavior of the DLATGS pyroelectric detector.
authors.affiliation: Optical Technologies and Scientific Computing, National Physical Laboratory, Teddington TW11 0LW, UK. e.theo@npl.co.uk
authors.forename: E
authors.initials: E
authors.lastname: Theocharous
mesh_terms: D003903:Deuterium / Q000737:chemistry; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry*; D008027:Light; D016014:Linear Models; D009842:Oligopeptides / Q000737:chemistry*; D010783:Photometry / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation*; D013431:Sulfates / Q000737:chemistry
chemical_list: D009842:Oligopeptides; D013431:Sulfates; D006046:Gold; D003903:Deuterium; C035647:glycyl-glycyl-glycine