Siemens Aktiengesellschaft

Other

Harald Bock

Detlef Stoll

Patrick Leisching

Alexander Richter

Christian Scheerer

Andreas Faerbert

Hubert Jäger

Richard Neuhauser

Joerg-Peter Elbers

Hubert Jaeger

Juergen Heiles

Wolfgang Peisl

Gerhard Stortz

An add-drop multiplexer has a group filter that divides an incoming WDM signal into several channel groups of corresponding adjacent WDM channels. A reconfiguration module is connected to each channel group. A first type of module makes it possible to perform a manual configuration of the Add-Drop channels and the coupled WDM channel while a second type of module makes it possible to carry out remote configuration. A fourth type of module enables remote configuration of the drop-continue channels.

Add-drop-multiplexer and optical wavelength division multiplex transmission system

A tunable add/drop&continue or drop&continue module comprises two optical filters where at least one is tunable and that are arranged following one another between a branching unit for optical signals and an insertion unit follow a branching unit for optical signals. The reflection attenuation of the one tunable optical filter is lower and the transmission attenuation higher than that of the other optical filter, as a result of which the drop&continue function of the module can be realized without high circuit-oriented expense.

Add/drop-drop and continue-module and drop and continue module

The present invention relates to a network node that includes optical add/drop modules such that a module can be exchanged without disruption of the connections.

Network nodes with optical add/drop modules

An optical filter, adjustable add-drop-continue module and circuit for bundled cross-connect functionality, wherein the transmission response of the optical filter is varied by changing its temperature, tuning of the filter can be carried out by mechanical pressure or tension, the filter can be used to produce add-drop-continue modules which are suitable both for add-drop operation and for drop-continue operation, and cross-connect modules can be constructed from the optical filters.

Optical filter, adjustable add-drop-continue module and circuit for bundled cross-connection functionality

A method and system for regulating the decision threshold and the sampling clock phase of a data regenerator for a binary signal, wherein error correction signals for erroneous 1-bits and 0-bits are used for regulating the decision threshold of a decision stage, and further phase correction signals between transitions of binary signals serve for the phase regulation of a sampling clock signal.

Method and system for regulating the decision threshold and the sampling clock phase of a data regenerator for a binary signal

A pumping source for Raman amplification of an optical wavelength-division multiplex signal which has a number of pump lasers with different pumping wavelengths in each case. The pumping wavelengths are selected in such a way that mixing products from a four-wave mixing are minimized in or removed from the signal spectrum. Transmission bands for the channels of the WDM signal also can be defined in the signal spectrum such that the mixing products are situated between the transmission bands. Differences in the signal-to-noise ratios between the channels of the WDM signal on the basis of four-wave mixing are, therefore, efficiently minimized in the signal spectrum.

Pumping source having a number of pump lasers for Raman amplification of a WDM signal with the aid of minimized four-wave mixing

An optical network node is provided having add-drop and/or cross-connect functions, wherein the optical network node includes a first optical line with a first drop branch and a first add branch, and a second optical line with a second drop branch and a second add branch, wherein the first drop branch and the second drop branch are in each case connected to a first cross-connect and to a second cross-connect, the first add branch is connected to the first cross-connect and to the second cross-connect via a first wavelength converter, and the second add branch is connected to the first cross-connect and to the second cross-connect via a second wavelength converter.

Optical node with add-drop or cross-connect functionality

A method for determining interactions between a number of optical channels in a wavelength division multiplexed signal wherein, given that during broadband optical transmission, the quality of a &ldquo;Dense Wavelength Division Multiplexed&rdquo; signal is adversely affected by multiple channel interactions, the method is used to determine the governing effects, the Kerr effect and the non-linear scattering process by evaluating the spectral profile of the Q factor or of the bit error rate.

Method for determining interactions between a number of optical channels in a wavelength division multiplexed signal

In an optical plug-type connection between two optical conductors having an optical terminal which receives an optical plug-type member, an electrical connection is provided for verifying that the optical plug-type connection has been made and/or released. This verification reduces the likelihood of an optical plug-type connection being erroneously acquired in the network management system and, thus, significantly reduces problems in locating errors in the optical communication system.

Growing community of inventors

Augsburg, Germany

Harald Bock