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Element of a wavelength division multiplexing optical network

A technology of wavelength division multiplexing and network elements, which is applied in the direction of wavelength division multiplexing systems, electrical components, multiplexing system selection devices, etc., and can solve problems such as high cost

Inactive Publication Date: 2012-11-14
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

They do, however, present a relatively high cost

Method used

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  • Element of a wavelength division multiplexing optical network

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Embodiment Construction

[0030] As a reminder, the wavelength selective switch is a piece of equipment including multiple optional ports and at least one shared port, which can implement a programmable multiplexing function or a programmable demultiplexing function. Whenever it acts as a demultiplexer, the optional port acts as an output and the shared port acts as a common input. The wavelength selective switch can selectively route each optical signal received on its shared input to one of its outputs as a function of the wavelength of the signal and the control signal. This device thus performs a programmable demultiplexing function on optical signals with different optical wavelengths aligned on a predetermined grid, so that each optical signal existing at the common input can be used as a function of its wavelength and command. One of the leading output ports. Each output port can therefore selectively receive one channel present at the shared input, multiple channels present at the shared input,...

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Abstract

A network element (10) comprises: a first optical input section (1), a first optical output section (2), a second optical input section (3) and a second optical output section (4) a first and second insertion and extraction modules (30, 40), each of said insertion and extraction modules comprising a wavelength selection switch (31, 41), a first optical coupler (8) comprising two bidirectional branches (21, 22) respectively connected to the first selectable port of the first and second insertion and extraction modules, and a second optical coupler (11) comprising two bidirectional branches (23, 24) respectively connected to the second selectable port of the first and second insertion and extraction modules.

Description

Technical field [0001] The present invention relates to the field of network elements used in wavelength division multiplexing or WDM optical networks, and more specifically, to transparent switching nodes used in such networks. Background technique [0002] The term "transparent" is used to refer to a transmission system in which the signal remains as an optical signal without being converted into an electrical signal. Transparency in optical communication networks is a characteristic that makes it possible to reduce the cost of network equipment by eliminating optical-electrical-optical conversion and thereby eliminating corresponding transducers. Subsystems used in transparent WDM networks include in particular reconfigurable optical add / drop multiplexers or ROADM and optical cross-connect or OXC. In order to build such a subsystem, a device known as a wavelength selective switch or WSS is particularly attractive. This is because this device makes it possible to create switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02
CPCH04J14/0212H04J14/0205H04J14/0216H04J14/0204H04J14/0206H04J14/0213H04J14/0209H04J14/02H04J14/02122H04Q11/0062
Inventor T·扎米J-M·雷桑N·勒莫尼耶
Owner ALCATEL LUCENT SAS