Effect of aerosol speckle phase decorrelation on the allowable signal averaging time for coherent optical receivers

Details Effect of aerosol speckle phase decorrelation on the allowable signal averaging time for coherent optical receivers Effect of aerosol speckle phase decorrelation on the allowable signal averaging time for coherent optical receivers

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2828..172h&link_type=abstract

Proc. SPIE Vol. 2828, p. 172-177, Image Propagation through the Atmosphere, J. C. Dainty; Luc R. Bissonnette; Eds.

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It is generally thought that the maximum signal averaging time for coherent (heterodyne) optical receivers is limited by the aerosol speckle phase decorrelation time. Fortunately, for many applications this is not true. It is demonstrated analytically and confirmed by experimental data that for many applications the signal averaging time is limited by the shorter of the laser transmitter or atmospheric turbulence phase decorrelation times. This can have a significant impact on lowering the threshold for signal detection when the fast Fourier transform (maximum likelihood estimator) is used to detect the signal.

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