How to choose the 40G QSFP + optical module in the multimode connection applications?

2017-07-17
Nowadays, with the rapid development of science and technology and the continuous improvement of user's needs, 40G applications in the communications industry are becoming more and more widely, at the same time, servers, switches, optical modules and other devices are also upgrading, the solutions for multi-mode application QSFP + Optical module are also more and more. Choosing the right 40G QSFP + optical module in a multimode connection application not only provides high performance, but also saves money. This article will explore how to choose a 40G QSFP + optical module for multimode connection applications.
How to choose the 40G QSFP + optical module in the multimode connection applications?
1. Multi-mode application under the 40G QSFP + optical module type

In the 40G short-range multimode connection applications, there are three commonly used optical modules on the market, namely 40GBASE-SR4 QSFP + optical module, 40GBASE-CSR4 QSFP + optical module and 40GBASE-SR BiDi QSFP + optical module, the detailed parameters are as follows:
Type Wavelength Transmission Type of port
40GBASE-SR4 QSFP+ 850 nm 150m (OM4)
100m (OM3)
MTP/MPO
40GBASE-CSR4 QSFP+ 850 nm 400m (OM4)
300m (OM3)
MTP/MPO
40GBASE-SR Bi-Directional QSFP+ 832 nm-918 nm, BiDi 150m(OM4)
100m(OM3)
30m(OM2)
LC
2. The factors to consider for select the 40G QSFP + optical module

1) Transmission distance

The maximum transmission distance of different QSFP + optical modules is different. In general, the 40GBASE-SR4 QSFP + optical module can support OM3 multimode fiber up to 100 meters of transmission and OM4 multimode fiber up to 150 meters of transmission. In other words, if the expected transmission distance of the project is less than 150 meters, you can choose to use the 40GBASE-SR4 QSFP + optical module with the OM4 cable; if the project has a longer distance requirements, support OM4 multimode fiber up to 400 meters 40GBASE-CSR4 will be a better choice.

2) The interface type

The 40GBASE-SR4 QSFP + optical module and the 40GBASE-CSR4 QSFP + optical module are both MTP interfaces, using with MTP / MPO fiber jumpers, but with different transmission distances. The 40GBASE-SR BiDi QSFP + optical module uses a duplex LC interface, using with LC multimode fiber jumpers.

3) Wiring program

In general, optical modules for 40GbE networks use parallel technology, which uses multiple 10Gbps lasers simultaneously to transmit on multiple fiber bundles to achieve high data rates (4 x 10Gbps). Therefore, 40G optics use MPO or MTP cabling , Instead of the traditional duplex LC cabling, 40GBASE-SR4 and 40GBASE-CSR4, these two 40G multimode QSFP + optical modules with MPO / MTP interface are suitable.

However, if the 40GbE network is deployed on an existing 10GbE infrastructure, the first two 40G QSFP + optical modules are not applicable. In this case, the 40G BiDi QSFP + optical module is suitable for it, which can support up to 150 meters of OM4 multimode duplex LC cabling.

4) Other factors

In addition to the three factors of transmission distance, interface type and routing scheme, other factors such as compatibility, receiver sensitivity and temperature are also important. Before selecting the 40G QSFP + optical module, the user should have an appropriate solution and take full account of the various aspects of selecting the most suitable 40G QSFP + optical module.

Conclusion

40G QSFP + optical module is a key component of 40GbE deployment, select the appropriate 40G QSFP + optical module to help the project to reduce costs and improve efficiency.

SFP+ module,SFP+ transceiver,bidi sfp,XFP module,XFP transceiver Which is good? First choice Fiberland!Thanks for your concern, to learn more about Fiberland, please enter Fiberland website: http://www.fiberlandtec.com/
RECENT BLOG POST
  • 01
    2019-10
    With the continuous development of 5G communication technology, 100G modules are gradually becoming popular. We know that there are many kinds of packages for 100G optical modules. From 2000 to now, the optical module package types have been rapidly developed. Its main package types are: GBIC, SFP, XENPAK, SNAP12, X2, XFP, SFP+, QSFP/QSFP+, CFP, CXP. In the fast-developing network era, some 100G optical modules avoid the risk of being eliminated, and upgraded and revised with the wave of the Internet, such as 100G CFP optical modules.
  • 01
    2019-10
    1. What is the CWDM SFP? The CWDM optical module is an optical module using CWDM technology to implement the connection between the existing network device and the CWDM multiplexer/demultiplexer. When used with a CWDM multiplexer/demultiplexer, CWDM optical modules can increase network capacity by transmitting multiple data channels with separate optical wavelengths (1270 nm to 1610 nm) on the same single fiber.
  • 01
    2019-10
    AOC is the abbreviation of Active Optical Cables, which is called Active Optical Cables in Chinese. AOC active optical is to encapsulate two optical modules and cable together. Because the medium of transmission in the middle is optical cable, AOC optical module, which contains laser devices, has a higher price for DAC. However, its optical aperture is not exposed, it has high reliability, and its working distance can be customized for a long distance of less than 100 meters.
  • 01
    2019-10
    Dense Wavelength Division Multiplexing (DWDM) technology is capable of transmitting data in an optical fiber using bit wavelength parallel transmission or string line transmission using the wavelength of the laser.It is widely used in different fields of communication networks, including long-distance backbone networks, metropolitan area networks (MANs), residential access networks, and local area networks (LANs).The DWDM optical module is the optical module that uses this technology, so the DWDM optical module has high bandwidth and long-distance transmission characteristics.