Abstract
Using a Gaussian weighting function for the receiver aperture, the authors obtain a closed-form representation for the receiver-aperture averaging effect for the intensity fluctuation of a beam wave in the turbulent atmosphere. It is shown that, unlike for the plane-wave case, the power scintillations do not always decrease when the receiver aperture is increased. The reasons are that (1) the intensity fluctuations on the axis for a coherent beam-wave source are smaller than these off the axis and (2) the averaging effect cannot show up when the total beam is within a coherent patch (i. e. , the coherence length is larger than the beamwidth).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 831-837 |
| Number of pages | 7 |
| Journal | Journal of the Optical Society of America |
| Volume | 73 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1983 |
ASJC Scopus subject areas
- General Engineering