Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2009-07-06
2010-12-07
Curs, Nathan M (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S007000, C398S057000, C398S072000
Reexamination Certificate
active
07848643
ABSTRACT:
A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON) includes a central office and remote nodes. When there is a fault in an optical fiber connecting a first blue/red band coupler to a blue/red band coupler R11, optical signals are inputted/outputted thereto/therefrom through a first 1×2 optical switch and a second blue/red band coupler, and when there is a fault in an optical fiber connecting the second blue/red band coupler to a blue/red band coupler R21, optical signals are inputted/outputted thereto/therefrom through the second 1×2 optical switch and the first blue/red band coupler.
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Chung Yun Chur
Han Kwan Hee
Lim Kyung Woo
Son Eui Seung
Curs Nathan M
Korea Advanced Institute of Science and Technology
Oliff & Berridg,e PLC
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