High-speed operation and fiber optic cabling in data centers

The development trend of high-speed transfer of big data centers

Today, most of the Internet links in corporate-level big data centers use optical fibers. Connectivity for parallel processing optical fibers (application scenario MPO) is becoming more and more popular as it enables pre-terminated system software that can be deployed quickly and efficiently.

Multimode fiber is still the key media choice for most corporate-level big data centers—compared to single-mode fiber, the cost of electronic components is lower, making it a cost-effective choice, and short-wavelength division multiplexing The selection of (SWDM4) and the release of the new fiber type OM5 can also expand the selection of multimode fibers according to the applicable longer outer chain length. The first way to maintain a higher external link rate is to use a single channel, which is the same as 40GBASESR4.

Another approach is to create a secure channel based on multiplexing several wavelengths of light on two fibers. As mentioned above, the ability to multiplex multiple sets of modules makes the feasibility analysis scalable enough. Figure 1 shows 2 examples of SWDM4 technology, namely 40G-SWDM4 and 100G-SWDM4. This transceiver can provide four 25GbE channels on two duplex multimode fibers, depending on the choice of several different optical wavelengths. Looking forward to the future, 100G-SWDM4 duplex can choose eight cores, and the polymer is a 400 GbE outer chain processed in parallel.

There will be a transition between duplex and parallel processing fibers, so it is expected that the deployment of fiber cabling system software should be able to accommodate this transition in the future. Ethernet interface fiber use - * OM3/OM4 reasonable way network bandwidth is limited to 850 nm

The first challenge of moving to a higher stat speed is the lack of space. In order to maintain a higher relative density, a large number of network design staff then choose MPO RF connectors. The duplex LC port number can be replaced with the MPO port number as necessary. If two duplex pairs can be used for optical fiber, the number of MPO ports can be used for external links up to 12 times the number of LC ports. MPO RF connectors are available in 8, 12 or 24 pin version numbers. MPO-8, MPO-12 and MPO-24 equipped

Choose the Best Multi-Modular RF Connectors for Your Application

When the 8-pin MPO RF connector was first released, 8 of the 12-pin parts of the standard 12-pin MPO RF connector were used to provide parallel processing data signal applications. This application typically occurs in QSFP transceivers for 40GBASE-SR4 or 100GBASE-SR4, where four fiber pairs can carry 10 or 25 GbE each to maintain a secure channel of 40 or 100 Gb/s.

From the perspective of infrastructure construction, the 8-pin MPO RF connector is most suitable for parallel processing using a 1:1 port number connection. One 8-pin RF connector is equivalent to one parallel processing port number. There are also other national standard multi-core RF connector options, such as 12-pin MPO or 24-pin MPO, and they continue to be popular enough in the sales market. Compared with the 8-core application, this MPO with a large number of cores can provide higher frame coordination capability and high relay efficiency.

For example, depending on the use of two 12-core MPOs or one 24-core MPO for the backbone cable, you can use several duplexes, several parallel processes, or separate compositions without reconnecting the cables. This type of coordination enables you to efficiently move mobile applications with trends in the Internet or business process entity models.

MPO-8 RF connectors and masts are used at a 1:1 ratio for this type of application, MPO-12 masts are suitable for this application at a 2:3 ratio, and MPO-24 masts are used at a 1:3 ratio The percentage applies to this application. In all MPO fiber system software, regardless of the number of cores in the RF connector, optical rotation or routing the data signal to the appropriate signal receiver is all the more important. Although a variety of optical rotation methods are available, method B is strongly recommended.

12-core (MPO-12) design concept

MPO-12 is a worldwide recognized standard interface for multi-group modules and multi-mode applications. It has been around for decades and is commonly used as a trunk cable RF connector for duplex and simplex applications. Because the QSFP application does not use all 12 cores as people have discussed before. In order to maintain the reasonable application of the optical fiber trunk cable, the middle 4 cores are composed of two 12 core trunk lines to show the additional QSFP 8 core port number. All 24 cores in the MPO-12 main pole are sufficient for flexible use. This type of design allows for round-tripping between parallel processing and duplexing applications.

24-pin (MPO-24) design concept

MPO-24 RF connectors will be the most cost-effective way to deploy parallel processing and duplex fiber optic applications. By connecting 24 cores in a single RF connector, it can provide a higher relative density than 3 MPO-8 RF connectors or 2 MPO-12 RF connectors, and speed up the cleaning and inspection related to installing the MPO system software time. The cross connection of the MPO-24 main pole provides a higher relative density of port numbers, and the indoor space requirements of the control panel are reduced to 1/3 of the MPO-8 and 1/2 of the MPO-12.

In dense applications, the specification of the backbone cable is the first consideration. A 144-core backbone cable using MPO-24 sub-modules occupies approximately 30% less total area than an equivalent MPO-12. For QSFP applications, compared with MPO-8 port numbers, MPO-24 can be used for 3 times higher relative density of control panels. Compared to MPO-8 or MPO-12 system software, MPO-24 system software is also suitable for more general parallel processing applications.

100G SR-10 uses multimode fiber that must be equipped with ten pairs of 10x10G. The MPO-24 provides an easy and immediate application for such 100G or 120G applications, using the MPO-24 for 100G and 120G parallel processing applications.

Consider big data center design concept requirements

Big data centers must respond quickly to explosive network bandwidth requirements, and new Internet functions such as the use of big data centers, the Internet, and electro-optical transceivers depend on the characteristics and adaptability of physical fiber infrastructure construction. The improvement of fiber optic infrastructure construction must rapidly shift development strategies to accommodate the booming duplex and parallel processing fiber optic transmission applications, which will be technologically advanced enough to be widely used along with economic development advantages.

Speed, coordination and scalability are important in network design. MPO cabling is quick to deploy, flexible to deploy, and expandable to optimal volume. It is manufactured by high-precision processing technology in the processing plant, and it is suitable for providing excellent, reliable and retestable applications for the most stringent network optical fibers. MPO system software provides a new solution for big data center design requirements.

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