Fujitsu Corporation

Eric Koopferstock

Daniel Bihon

An optical system including a first filter including i) a first port mapped to a first wavelength band and ii) a second port mapped to a second wavelength band, the first filter configured to receive a first transmission signal at the first port and a second transmission signal at the second port, the first transmission signal within the first wavelength band, the second transmission signal within the second wavelength bands; a second filter including i) a third port mapped to the first wavelength band and ii) a fourth port mapped to the second wavelength band, the second filter configured to receive a third transmission signal at the third port and a fourth transmission signal at the fourth port, the third transmission signal within the first wavelength band, the fourth transmission signal within the second wavelength band and; and a wavelength selector.

Optical system including a reconfigurable optical add/drop multiplexer and filters

A reconfigurable optical add/drop multiplexer (ROADM) complex in an optical network may include one or more core ROADM devices, each including multiple input/output port pairs configured for respective wavelengths or wavelength bands to be coupled to a fiber distribution panel (FDP) over fiber. The FDP may include multiple FDP connectors to receive optical signals from the core ROADM device(s) and may extract and route optical signals having a single wavelength to respective transponder connectors of the FDP for coupling to a transponder. Multiple expansion options may be enabled at the FDP. For example, according to one option, a single expansion connector may be enabled for coupling to an expansion device to provide additional drop port capacity. In another example, multiple expansion connectors may be enabled for coupling to respective expansion devices.

Splitter-based colorless-directionless-contentionless reconfigurable optical add/drop multiplexer

Methods and systems may implement a credit based approach for optimizing optical transmission and calculating optical paths in optical networks.

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Plano, TX, United States of America

Eric Koopferstock