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Processing data in a coherent optical communication system

A technology of coherent optical communication and data flow, applied in the field of optical communication, can solve problems such as complex modulation formats

Active Publication Date: 2013-10-23
JUMIPER NETWORKS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Scaling to this type of high frequency optical communication system presents design challenges in order to maintain signal integrity not only due to its higher bandwidth but also due to its complex modulation format

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  • Processing data in a coherent optical communication system
  • Processing data in a coherent optical communication system
  • Processing data in a coherent optical communication system

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Embodiment Construction

[0020] figure 1 To show a block diagram of the optical communication system 10. As shown in the figure, the optical communication system 10 includes a network 26 coupled to a line card 12 through an optical link 24. Examples of the optical communication system 10 include, but are not limited to, wavelength division multiplexing (WDM) systems, including dense wavelength division multiplexing (DWDM) systems. For example, a WDM system includes multiple slots reserved for multiple line cards (eg, line card 12). However, aspects of the present disclosure are not limited to WDM systems including line cards. The technology of the present disclosure can be extended to other optical communication systems that need to transmit and receive data. For illustrative purposes only and for ease of description, various examples are described in connection with a WDM system.

[0021] In the WDM system, for downstream transmission, the line card 12 receives an optical signal from the network 26 t...

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Abstract

This disclosure describes techniques to sample electrical data streams in coherent receivers. For instance, an analog-to-digital converter (ADC) samples the received electrical data stream at a sampling rate that is nominally twice or greater than twice the symbol rate of the electrical data stream that the ADC receives. A digital filter receives the digital data stream from the ADC, and digitally filters the digital data streams to output a filtered digital electrical data stream at an effective sampling rate that is less than the sampling rate and less than twice the symbol rate, and greater than or equal to the symbol rate.

Description

[0001] This application claims the rights and interests of U.S. Patent Application No. 13 / 434,213 filed on March 29, 2012, the full text of which is incorporated herein by reference. Technical field [0002] The present disclosure relates to optical communication, and more specifically, to a coherent optical communication system. Background technique [0003] Generally, optical communication systems operate in the range of 1 gigabit per second (Gbps) to 10 Gbps. As the amount of data that needs to be transmitted increases, optical communication systems that operate at even higher data rates are required. For example, some recent optical communication systems operate in the 100Gbps range. When expanding to this type of high-frequency optical communication system, not only because it has a higher bandwidth, but also because it has a complex modulation format, so in order to maintain signal integrity, a design challenge is presented. Summary of the invention [0004] Generally, this...

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Application Information

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IPC IPC(8): H04B10/61
CPCH04B10/6166H04J14/06H04B10/616H04B10/6161H04B10/40H04L7/0075H04L27/2273
Inventor 克里斯蒂安·马卢因西奥多·约翰·施密特章波埃利亚斯·辛普森罗伯托·马科克西亚
Owner JUMIPER NETWORKS INC