Laser Intensity Fluctuations in the Heterodyne Detection of Scattered Light

  • H. M. Fijnaut
  • F. C. van Rijswijk
Part of the Nato Advanced Study Institutes Series book series (NSSB, volume 23)


In our experiments on several light scattering systems we observed that low frequency intensity fluctuations from the laser (TEM 00) did not appear at all in homodyne experiments, whereas in a number of heterodyne experiments the laser noise poisoned our time auto-correlation function of the scattered light. To understand our observations the following calculations were performed on laser noise in connection with the coherence properties in the detection of scattered light. The problem without the coherence properties in the detection was studied earlier by Cummins and Swinney1 for the homodyne case and by Degiorgio2.


Correlation Function Shot Noise Incident Laser Local Oscillator Intensity Fluctuation 
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  1. 1.
    H.Z. Cummins, H.L. Swinney, Progress Opt. 8, 133, 1970.CrossRefGoogle Scholar
  2. 2.
    V. Degiorgio, this book.Google Scholar
  3. 3.
    N. Clark, J.H. Lunacek and G.B. Benedek, Am. J. Phys. 38, 575, 1970.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • H. M. Fijnaut
    • 1
  • F. C. van Rijswijk
    • 1
  1. 1.Van’t Hoff Laboratory and Physics LaboratoryUtrechtThe Netherlands

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