Unlock instant, AI-driven research and patent intelligence for your innovation.

roadm transponder aggregator system and method of operation

A transponder and aggregator technology, applied in the direction of wavelength division multiplexing system, optical multiplexing system, multiplexing system selection device, etc., can solve the problem of not having enough flexibility, non-blocking and wavelength transparency Access and other issues

Active Publication Date: 2016-08-24
NEC CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although conventional ROADM nodes have some degree of flexibility to add and drop signals on WDM channels, they are not flexible enough to accommodate the rapid growth and increasingly dynamic Internet-based traffic
For example, transponders of conventional ROADM nodes typically do not have non-blocking and wavelength-transparent access to all Dense Wavelength Division Multiplexing (DWDM) network ports

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • roadm transponder aggregator system and method of operation
  • roadm transponder aggregator system and method of operation
  • roadm transponder aggregator system and method of operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Before describing the exemplary embodiments of the present invention in detail, it is important to point out that since CL&DL MD-ROADM nodes allow for flexible wavelength allocation, it is typically no longer possible to employ the optical multiplexers commonly used in conventional ROADM nodes. Instead of an optical multiplexer, an optical coupler can be used in the transponder aggregator to combine on the channel the added signal received from the local transponder. However, such a "no multiplexer" architecture has drawbacks in terms of optical performance.

[0026] For example, the lack of multiplexers leads to inter-channel crosstalk between different DWDM channels and especially between adjacent channels. Generally, as the transmission bit rate increases, the signal spectrum becomes wider and the inter-channel crosstalk becomes more serious. Figure 3A and Figure 3B Diagram illustrating an optical multiplexer for 128Gb / s PDM-NRZ-QPSK (Polarization Division Multip...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A ROADM node system and method of operation are disclosed. The ROADM node system may include transponder aggregators including transponders for inserting signals for handover by the ROADM nodes. Transponder aggregators can be restricted from inserting signals on adjacent channels for simultaneous use. Furthermore, the transponder aggregator may include optical couplers instead of optical multiplexers. A ROADM system may include a set of wavelength selective switches associated with the output ports, which may provide an additional filtering function for the added signal prior to transmission on the WDM network.

Description

[0001] Related application information [0002] This application claims priority to Provisional Application Serial No. 61 / 326,394, filed April 21, 2010, which is hereby incorporated by reference. [0003] This application is also related to commonly owned co-pending application serial number 12 / 718,145 filed March 5, 2010 and commonly owned provisional application serial number 61 / 250,185 filed October 9, 2009, which Each of the documents is hereby incorporated by reference. technical field [0004] The present application relates to reconfigurable optical add / drop multiplexer (ROADM) systems and methods of operation, and in particular to managing add signals in ROADM nodes. Background technique [0005] A reconfigurable optical add-drop multiplexer (ROADM) node is an important optical network element that allows flexible insertion and drop at the wavelength layer on any or all wavelength division multiplexing (WDM) channels Signal. A multi-degree ROADM node (MD-ROADM), ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H04B10/2581
CPCH04J14/0204H04J14/0205H04J14/0208H04J14/0209H04J14/0212H04Q11/0005H04Q2011/0015H04Q2011/0016H04Q2011/0024H04J14/02122
Inventor P.纪Y.奥诺T.王
Owner NEC CORP