How to use DWDM for 40G long-distance network transmission?

Jun 18, 2020

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With the growth of the enterprise and the development of the network, the amount of data accumulated has continuously increased. The basic network transmission system needs to have higher network capacity and longer transmission distance to meet the requirements of large-capacity data storage and efficient data transmission. HTF customers intend to deploy a 40G150KM DWDM network to improve the scalability of the network and prepare for future business development.


Analysis of customer network needs

The customer needs to transmit a distance of 150KM between the two sites.

 


HTF 40G long-distance DWDM solution

Provided DWDM solution, using 8-channel wavelength division multiplexer to solve user needs through two-fiber bidirectional transmission.

40g 150KM

Big cost advantage. This solution does not require additional fiber deployment. First, the MTP-LC branch jumper is used to decompose the 40G optical signal into four 10G optical signals, and then they are converted into four 10G DWDMs with the maximum transmission distance of 80KM using OEO optical amplifiers. Optical wavelength, considering the loss of optical transmission, the actual maximum transmission distance can exceed 60KM, or even approach 80KM, which can fully guarantee the customer's transmission distance requirements.


Since the 10G DWDM 80KM optical module belongs to long-distance transmission, its average received optical power is greater than the input optical power, so it is necessary to add an optical attenuator of 13-20dB to attenuate the signal strength of the optical fiber to ensure that the actual received power of the optical module is less than the input optical power Avoid burning the optical module.


The enhanced optical power amplifier (BA) is deployed behind the wavelength division multiplexer at the sending end to provide the transmitted optical power of the system. The preamplifier (PA) is deployed in front of the wavelength division multiplexer at the receiving end to improve signal reception Sensitivity.


The 40G network solution is a cost-effective choice to meet the needs of high-bandwidth, low-latency networks. HTF 40G network solution uses a convenient and cost-effective 10G wavelength division multiplexing system to expand the 40G network, largely using the original network equipment, avoiding a large number of new product purchases and reducing the company's investment costs.


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