Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2008-05-20
2008-05-20
Hughes, Deandra M. (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
C359S337100, C359S337110, C359S337130
Reexamination Certificate
active
11311394
ABSTRACT:
An optical transmitting apparatus includes a variable optical attenuating unit for attenuating signal light variably, an optical amplifying unit for amplifying the signal light, and a looped optical circuit for returning the signal light from the optical amplifying unit to the variable optical attenuating unit. The variable optical attenuating unit further attenuates the returned signal light variably.
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Bolda Eric
NEC Corporation
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