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US 11,700,067 B2Granted
Three-way branching unit switch module having small footprint
AssigneeNEC Corporation
InventorsFatih Yaman, Shinsuke Fujisawa, Hussam Batshon, Yoshinari Takigawa, Ryu Kurahashi, Ryuji Aida, Kohei Nakamura, Takanori Inoue, Eduardo Rodriguez, Yoshihisa Inada
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Abstract
Aspects of the present disclosure describe a three-way branching unit switch module having a small footprint suitable for application in an undersea application.
Claims1
An undersea, submarine optical fiber transmission system architecture comprising:
- three landing stations, A, B, and C, each of the landing stations connected by two respective optical fiber pairs to a branching unit;
- the branching unit configured to provide a three-way switching (3WS) function among and between the three landing stations, and
- the branching unit comprising an arrangement of optical switches configured to provide states/connections among and between the three landing stations;
- wherein the branching unit includes 6 1×2 optical switches arranged in groups of 2 switches, each switch of each group optically connected to a circulator which is optically connected to a respective one of the landing stations via a fiber pair, and each group of switches is optically connected to each of the other groups.
1 more element
Dependencies are inferred from the claim text.