Why choose 100G?

   1. Ultra-large pipes provide broader bandwidth for new and IP-based services

   2. Efficient transmission of SDH, OTUk, Ethernet, FC, and other services

   3. Seamless nerwork upgrades with hybrid 10G, 40G, and 100G service transmission

   4. Scaled deployment at the backbone network core layer, MAN core and aggregation layers, and on LANs

   5. Low power consumption and eco-friendly operation with advanced chip technology

   6. Simplified network structure and O&M as coherent detection and DSP technology make dispersion-compensatory and low-PMD fibers unnecessary

 

                                                                                                                What is 100G?

   Optical communications have evolved from 2.5G to 100G. The 100G system integrates new 10G/40G-based technologies to accelerate the line rate to betond 100 Gbit/s with better performance and large-capacity expansion.

 

Core 100G technologies

   The key performance indicators of an optical transmission system include OSNR, CD, and PMD tolerances, as well as resistance against nonlinear fiber effects. The 100G system use technologies to increase the line rate to 100 Gbit/s, while reducing OSNR requirements and nonlinear fiber effects and improving the CD tolerance, PMD tolerance, and transmission distance. Discover how these new technologies work together.

     The line rate can reach 100 Gbit/s

     only with:

     . polarization splitting on receive end signals

     . improved CD tolerance

     . improved PMD tolerance

 

     This modulation reduces the spectrum width by decreasing the baud rate and achieves the 100 Gbit/s line rate.

     PMD actually modulates an optical signal in two polarization directions. This processing effectively divides data into two, halving the baud rate. One phase in QPSK represents two bits, as also effectively dividing data into two.

     QPSK-PDM modulation decreases the baud rate from 112 Gbit/s to 28 Gbit/s in a sample 100G system with 7% FEC overheads. Current optical and electrical components are therefore usable in a 100G or WDM system with a 50 GHz channel spacing.

     This solution addresses the line rate issue and lowers demand on the system OSNR. Coherent detection and DSP technologies are now needed at the receive end to restore the transmitted signals. 

 

                                                                           

                                                                                . implement signal polarization splitting.

                                                                                . improve OSNR sensitivity.

                                                                                . increase receiver sensitivity.

  But thats not the only improvement.                  . compensate for CD and PMD tolerances.  

 

    . obtains a higher coding gain

    . lowers OSNR requirements

    . satisfies long-haul transmission requirements

 

                                                                                                       

    The spectrum distribution of electrical signals at the transmit end is adjusted to reduce the spectrum width and linear crosstalk. This technology enhances resistance to nonlinear fiber effects.

 

    . makes the spectrum adjustable

    . compatible with the existing fixed spectrum

 

    Flexible grid divides the optical spectrum into multiple slices. 322 slices would each have a 12.5 GHz spectrum width. These slices can be flexibly allocated to match different signal bandwidths. This technology can be used for both 40-channel and 80-channel systems.

   It can also increase spectrum utilization and serves as the optical-layer platform technology for beyond 100G.

 

 

===Link archives (updated 2015-05-26)===

>>>Click here for the latest links

 

Amazing Microwaves	Demystifying MSTP	WDM Optical Transport
Huawei RTN: Birth and Evolution	Prelude●Overview and History	Speaking of 100G
How to Maximize BW of Air Interface (1)	MTU, MFL and Jumbo Frames
How to Maximize BW of Air Interface (2)	Key Technologies of EoS: GFP, VCAT and LCAS
How to Maximize BW of Air Interface (3)	PCM Ports, Boards, Services, and Application Scenarios

 

Thank for your recommendation. It was very usuaful for me. Regards

Marta

Thank you for sharing :)

Thank you for sharing :)

kradman Posted on 2015-09-13 18:14

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Thanks for sharing....

Thank for your recommendation. It was very usuaful for me. Regards

Marta

martaiglesias Posted on 2015-05-29 23:50

thanks, were very glad to hear that :)

Kalpesh.Parmar Posted on 2015-05-26 10:23

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pema_d Posted on 2015-05-13 11:22

thanks very much for your reply, and were glad to share it.

Thanks for sharing....

Sonam Tshering 发表于 2015-09-14 11:13

 

Cool poster, thank you