Branching unit

Optical waveguides – With optical coupler – Plural

Reexamination Certificate

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Reexamination Certificate

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06895142

ABSTRACT:
An optical branching unit is formed of a plurality of interconnected optical interleavers for separating input optical signals into separate components for output on separate branches and for combining separated component optical signals with other input optical signals for output on common branches.

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patent: 6765775 (2004-07-01), Pirovano
patent: 6781754 (2004-08-01), Zhao
patent: 20010015836 (2001-08-01), Kim et al.
patent: 20020149818 (2002-10-01), Tomofuji et al.
patent: 2315380 (1998-01-01), None
patent: 2348557 (2000-10-01), None
patent: WO 0048348 (2000-08-01), None

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