Terrestrial optical communication network of integrated fiber and free-space links which requires no electro-optical conversion between links
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United States of America Patent
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Mar 15, 2005
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N/A
app pub date -
May 4, 2001
filing date -
Apr 24, 1998
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Abstract
Optical signals are received from a free-space link by directing received light onto a plurality of microlenses and then directing light received through each of the microlenses into a respective single mode optical fiber (SMF). Light beams from the SMFs are combined into a single light beam in one SMF. The single light beam is amplified with a multi-wavelength fiber amplifier and attenuated with a variable optical attenuator. The power gain of the multi-wavelength fiber amplifier and the attenuation of the variable optical attenuator are controlled. The single light beam is directed into a fiber optic communication system that is optically coupled to the variable optical attenuator.
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