Alcatel Lucent

Alcatel

Draka Comteq B.v.

Jean-Christophe Antona

Pierre Sillard

Dominique Chiaroni

Gabriel Charlet

Christian Simonneau

Thierry Zami

Arnaud Bisson

Sebastien Bigo

Annalisa Morea

Bruno Lavigne

Franck Bruyere

Pierre Peloso

Florence Leplingard

Sébastien Bigo

Petros Ramantanis

Yvan Pointurier

Patricia Layec

Emmanuel Seve

Oriol Bertran Pardo

A technique is provided for determining an optical transmission system description. The technique includes determining a dispersion map of the optical transmission system, placing a set of discrete cumulative dispersions onto the dispersion map, and defining a plurality of sequential system segments of the optical transmission system. Each system segment has an input point that corresponds to a point in the optical transmission system where the input cumulative dispersion matches a cumulative dispersion of the set of discrete cumulative dispersions. For each system segment, an input power of the system segment and a local dispersion value of the system segment is determined. Also, for each system segment, a sequence number of the system segments is stored. Furthermore, for each system segment, the input power and the local dispersion value determined in relation with the input cumulative dispersion of the system segment in a data repository is stored.

Method for determining an optical transmission system description

An exemplary method is provided for determining a maximum transmission distance for an optical link that has heterogeneous types of optical fiber segments. The method includes retrieving from a database a maximum transmission reach value for each type of optical fiber present in the optical link. A length of each type of the optical fiber to reach a distance is computed, where, for each type of the optical fiber present in the optical link, segments are summed from a starting point to the distance to determine the length of each type of the optical fiber along the optical link. The length for each type of the optical fiber in the optical link is normalized by multiplying the length of each type of the optical fiber by a weight chosen as a function of the maximum transmission reach value for each type of said optical fiber.

Determination of a maximum transmission distance for heterogeneous types of optical fibre

A method of operating a WDM transmission system with at least one transmitter and at least one receiver connected by means of a dispersive transmission line. The proposed method comprises the successive steps of successively: a) setting a tunable dispersion pre-compensation value at a transmitter-side Tunable Dispersion Compensation Module in operative connection with the transmitter to a first predetermined value (PRE&#xb0;); b) setting or adjusting a tunable dispersion post-compensation value at a receiver-side Tunable Dispersion Compensation Module () in operative connection with the receiver to a second value (POST&#xb0;) in order to optimize at least one characteristic (monitored performance like BER, eye opening, Q factor BER) of a transmitted signal at the receiver; and then c) simultaneously tuning the transmitter-side Tunable Dispersion Compensation Module and the receiver-side Tunable Dispersion Compensation Module with opposite respective dispersion shifts in order to further optimize said characteristic of the transmitted signal.

Method of operating and optimising a WDM transmission system and computer program product

A multimode fiber having an index profile such that, for a propagation mode other than the fundamental mode and at a wavelength of 1550 nm, the fiber presents a positive chromatic dispersion greater than or equal to 50 ps/run/km, a positive chromatic dispersion slope and a figure of merit (FOM) greater than or equal to 200 ps/run/dB.

Compensating fiber for cumulated chromatic dispersion and chromatic dispersion slope

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Montrouge, France

Jean-Christophe Antona