Bi-directional amplifier
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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Apr 4, 2001
filing date -
Apr 4, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A bi-directional optical amplifier arrangement for use in an optical path along which a bi-directional optical signal is travelling, the arrangement comprising at least two amplifier units disposed to amplify, in use, in different propagation directions, at least two propagation direction dependent optical junction elements, at least two optical paths disposed in parallel between the junction elements, wherein each optical paths comprises one of the amplifier units; and wherein gain settings of the amplifier units are chosen in a manner such that, in use, a total gain experienced by an optical signal re-circulating along both optical paths is less than unity.
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