Optical: systems and elements – Optical amplifier – Particular active medium
Reexamination Certificate
2010-05-04
2011-10-25
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Particular active medium
C398S072000, C398S099000
Reexamination Certificate
active
08045261
ABSTRACT:
A Reflective Semiconductor Optical Amplifier (RSOA) for compensating for light loss in an optical link, an RSOA module for improving polarization dependency using the RSOA, and a Passive Optical Network (PON) for increasing economical efficiency and practical use of a bandwidth using the RSOA are provided. The PON includes a central office comprising a plurality of optic sources transmitting a downstream signal and a plurality of first receivers receiving an upstream signal; at least one optical network terminal (ONT) including a second receiver receiving the downstream signal and an RSOA which receives the downstream signal, remodulates the downstream signal into the upstream signal, and transmits the upstream signal in loopback mode; and a remote node interfacing the central office with the ONT. The upstream signal and the downstream signal are transmitted between the remote node and the ONT via a single optical fiber. The remote node includes an optical power splitter at its port connected to the ONT.
REFERENCES:
patent: 2003/0142978 (2003-07-01), Lee et al.
Kim Byoung Whi
Kim Tae Yeon
Lee Woo-Ram
Park Mahn Yong
Electronics and Telecommunications Research Institute
Hellner Mark
Ladas & Parry LLP
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