The patent's assignee is
News editors obtained the following quote from the background information supplied by the inventors: "Telecommunications systems, cable television systems and data communication networks use optical networks to rapidly convey large amounts of information between remote points. In an optical network, information ('traffic') is conveyed in the form of optical signals through optical fibers. The optical signals may comprise a beam of light having a specific wavelength and having the traffic modulated onto the beam. In some instances a wavelength configured to carry information may be referred to as an 'optical channel' or a 'channel.' Each channel may be configured to carry a certain amount of information through an optical network at a particular data rate.
"However, as an optical signal propagates through a network noise associated with the signal may increase, which may decrease the Optical Signal to Noise Ratio (OSNR). If the OSNR is sufficiently low, the information modulated on the optical signal may not be detected by optical receivers associated with the optical network. Accordingly, as an optical signal propagates from one location to another, the signal may undergo multiple optical to electrical to optical (OEO) conversions to remove the optical noise and regenerate the optical signal. Implementing such OEO regenerations may be costly.
"Additionally, the techniques used to increase the amount of traffic carried by an optical signal may reduce the distance that an optical signal may travel before requiring an OEO conversion (also known as the 'reach' of the optical signal). For example, a high capacity (e.g., a 400 Gigabits/second (400 G)) optical signal may have more stringent performance requirements (e.g., a higher Optical Signal to Noise Ratio (OSNR) requirement) than lower capacity optical signals (e.g., 10 G, 40 G, 100 G optical signals). As such, the reach of high capacity optical signals may be smaller than the reach of lower capacity optical signals."
As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "In accordance with the present disclosure, disadvantages and problems associated with transmitting optical signals may be reduced. In accordance with one or more embodiments of the present disclosure a network element comprises a plurality of optically absorbent layers. Each layer is configured to receive an optical signal such that the optical signal passes through the layer. The optical signal has a specific polarization state and is associated with noise having a plurality of randomly varying polarization states. Each layer absorbs optical waves having a particular polarization state. The particular polarization state of each layer is different from the polarization state associated with the other layers. The plurality of layers are coupled together such that as the optical signal and associated noise pass through the plurality of layers, the network element absorbs the associated noise more than the polarized optical signal to improve an Optical Signal to Noise Ratio (OSNR) of the optical signal.
BRIEF DESCRIPTION OF THE DRAWINGS
"Embodiments of the present disclosure are made by way of example and are not limited to the following figures in which:
"FIG. 1 illustrates an example embodiment of an optical network, in accordance with some embodiments of the present disclosure;
"FIG. 2A illustrates an example of a noise reducer configured to optically reduce noise associated with an optical signal, in accordance with some embodiments of the present disclosure;
"FIG. 2B illustrates the polarization states associated with the noise reducer, optical signal and noise of FIG. 2A, in accordance with some embodiments of the present disclosure; and
"FIG. 3 illustrates an example of a noise reducer comprising layers that include quantum dots, in accordance with some embodiments of the present disclosure."
For additional information on this patent application, see: Akasaka, Youichi. Method and System for Reducing Noise Associated with Optical Signals. Filed
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