Transmitter pointing loss calculation for free-space optical communications link analyses

Details Transmitter pointing loss calculation for free-space optical communications link analyses Transmitter pointing loss calculation for free-space optical communications link analyses

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apopt..26.2055m&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 26, June 1, 1987, p. 2055-2057.

Physics

Optics

Data Links, Optical Communication, Pointing Control Systems, Transmission Loss, Accuracy, Far Fields, Transmitters

Scientific paper

In calculating the performance of free-space optical communications links, the transmitter pointing loss is one of the two most important factors. It is shown in this paper that the traditional formula for the instantaneous pointing loss (i.e., for the transmitter telescope far-field beam pattern) is quite inaccurate. A more accurate and practical approximation is developed in which the pointing loss is calculated using a Taylor series approximation. The four-term series is shown to be accurate to 0.1 dB for the theta angles not greater than 0.9 lambda/D (wavelength/telescope diameter).

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