The linearity of Golay detectors

Экспериментальная Техника Субмиллиметровых Волн

“…Чувствительность начинает падать, когда длина волны становится сравнимой с толщиной слоя алюминия. Пневматические прием-ники фирмы «UNICAM» (Англия) при мощности излучения до 3-Ю" 6 вт обладают линейностью R, лучшей 1% 146 . Для тепловых приемников характерна постоянная времени τ л?…”

Optical power detector with broad spectral coverage, high detectivity, and large dynamic range

“…The upper limit (8.2 mW at 40 Hz modulation frequency) of the dynamic range is in this case set by saturation of the readout interferometer. This linear dynamic range is at least 20 dB better than that of a typical MCT detector [32] or Golay cell [16] and can be further enhanced by varying the modulation frequency, because the photoacoustic response drops as the modulation frequency is increased [25]. Alternatively, one can avoid signal saturation by reducing the chopping duty cycle, which limits the amount of optical energy incident on the detector per pulse.…”

“…Hz have been reported for both Golay cells and miniaturized versions based on tunneling displacement transducers [6,15]. The poor linearity of the diaphragm microphone poses an additional challenge [16,17]. Due to these limitations, the Golay cell mainly finds use in niche laboratory applications, although the fundamental underlying principle, photoacoustic detection, offers the possibility for one of the most versatile high-performance thermal detectors.…”