Method and apparatus for free-space optical communication without eletro-optical conversion
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United States of America Patent
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Aug 23, 2005
Grant Date -
Nov 14, 2002
app pub date -
Jul 3, 2002
filing date -
Apr 24, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Erbium doped fiber amplifiers (ERDAs) optically couple optical signals between free-space and fiber optic links of a terrestrial optical communication network. The optical gain of transmitting and receiving ERDAs is controlled to achieve good optical signal communication. Control occurs in response to signals received at the transmitting and receiving ends of the links. Control, status and management information may be communicated optically between link head stations. The physical position of transceivers at opposite ends of the link optical signal paths is also controlled.
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