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25G DWDM Network for 1Tb/s Transmission System Between Two Sites

  • Telecommunication
  • China

Background

Our customer works as an Internet Data Center service provider who wants to build a fiber optic link between two sites to handle up to 1TB data traffic. The two sites are 22km away from each other.

Challenge

Our customer is in need of a TB-level transmission system.
Line protection is required to prevent link failure from affecting data transmission.
Supervise mechanism is required to monitor link operation status, detect, record and locate faults.
The total optical loss of the current link is 10dB.

Solution

Two sets of the FS 40CH DWDM MUX are installed at the two sites, realizing at most 40 channels bi-directional data transmission.

  •  

    25G link carries larger capacity than 10G link does. Together with the 40CH DWDM MUXs, 1000G volume of data can be sent at the same time.

  •  

    Two optical line protection switches (OLP) are added to provide a backup path when the primary one encounters large link loss or breaks down. In this way, they can guarantee the smooth running of the network.

  •  

    FS 40CH DWDM MUX/DEMUX are equipped with monitor port which can work as an optical splitter to set certain business signal aside for monitoring. It won’t affect the data transmission.

  •  

    The booster amplifier operates at the transmission side of the link to amplify aggregated optical input power for reach extension. OPAs are placed before the DEMUXs to increase the optical power level of DWDM channels before being received. The TDCM modules are, in particular, placed in the 25G DWDM transmission system which is required to ensure the accuracy of dispersion compensation. With these in place, there can be a 3dB surplus even when the link loss reaches 12dB.



FMT20PA-EDFA, 20dB Gain DWDM EDFA Pre-Amplifier, 13dBm Output

US$ 1,449.00

FMT17BA-EDFA, 17dBm Output DWDM EDFA Booster Amplifer, 17dB Gain

US$ 1,729.00

FMT-OLP2, 1+1 Optical Line Protection Switch (OLP)

US$ 509.00

Customized C-band Tunable Dispersion Compensation Module (TDCM)

US$ 3,271.00

LC/UPC Singlemode Fixed Fiber Optic Attenuator, Male-Female, 10dB

US$ 3.20


Conclusion

In this case, we helped our customer build a 25G DWDM network which realizes 1Tb/s large capacity transmission between two sites. The cost efficient solution not only covers long-range data transmission but also saves costs compared to 100G coherent DWDM program.

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