Measurement of Low Light Intensities by Synchronous Single Photon Counting
作者:
F. T. Arecchi,
E. Gatti,
A. Sona,
期刊:
Review of Scientific Instruments
(AIP Available online 1966)
卷期:
Volume 37,
issue 7
页码: 942-948
ISSN:0034-6748
年代: 1966
DOI:10.1063/1.1720370
出版商: AIP
数据来源: AIP
摘要:
Single photon counting technique is used for measuring continuous light fluxes of very low intensity suitably modulated. Demodulation and integration processes usually made in conventional synchronous detectors on analog signals are here performed with drift free digital operations. The main advantage of this procedure is the possibility of improving the signal‐to‐noise ratio by very long integration times which are not limited by drifts of the electronics following the detector. An analysis of the noise filtering properties of the device is given. Raman light angular distributions obtained by this technique are reported as an example and noise characteristics of the device are measured and compared with the results of the theoretical analysis.
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