Evaluation of far-field pattern of laser transmitter onboard the Laser Communication Equipment

Morio Toyoshima; Takayuki Fukazawa; Masahiro Toyoda; Tetsuo Takahashi; Motokazu Shikatani; Yoshinori Arimoto; Kenichi Araki; Tadashi Aruga

doi:10.1117/12.273704

24 April 1997 Evaluation of far-field pattern of laser transmitter onboard the Laser Communication Equipment

Morio Toyoshima, Takayuki Fukazawa, Masahiro Toyoda, Tetsuo Takahashi, Motokazu Shikatani, Yoshinori Arimoto, Kenichi Araki, Tadashi Aruga

Author Affiliations +

Proceedings Volume 2990, Free-Space Laser Communication Technologies IX; (1997) https://doi.org/10.1117/12.273704
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

A far-field pattern of an onboard laser transmitter was measured using a trans-atmospheric optical link over 35,000 km range between a satellite and an optical ground station. The acquisition of the far-field pattern is made in use of a new proposed statistical analysis of downlink irradiance data obtained at the ground station. Tracking/pointing statistical characteristics of the transmitter is taken into account in order to estimate downlink irradiance when there would be no atmospheric scintillation effects. The peak directive gain of the downlink laser beam was 104.3 dB. The beam width was 28.5 X 17.5 (mu) rad. These results were consistent with the results at a laboratory test performed before launch of the satellite.

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Morio Toyoshima, Takayuki Fukazawa, Masahiro Toyoda, Tetsuo Takahashi, Motokazu Shikatani, Yoshinori Arimoto, Kenichi Araki, and Tadashi Aruga "Evaluation of far-field pattern of laser transmitter onboard the Laser Communication Equipment", Proc. SPIE 2990, Free-Space Laser Communication Technologies IX, (24 April 1997); https://doi.org/10.1117/12.273704

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