Background
With the rapid development of the communication industry and data transmission technology, there is an increasing demand for higher speed and longer transmission distance of communication access networks. Therefore, some new transmission technologies have been developed to meet this demand, such as SWDM (Short-Wave Division Multiplex) technology.
What Is SWDM Technology
With a single multi-mode fiber, shortwave wavelength division multiplexing (SWDM) technology combines several wavelengths in the fiber optic spectrum's shorter wavelength end, about 850 nm (MMF). That is to say, the same well-known CWDM technology is used in short-range MMF systems.
To attain higher data rates, SWDM systems use channels centered at 850, 880, 910, and 940nm (30nm spacing). In practice, 40Gbps is implemented as 10Gpbs×4λ and 100Gbps as 25Gbps×4λ.
Structure of SWDM
SWDM technology is composed of multiple separate optical signals that are combined into one, then modulation is added to change the signal characteristics. The modulation is usually done by an optical multiplexer, and all signals are merged into a single optical fiber, thus greatly increasing the transmission capacity of the optical fiber.
Why We Choose SWDM
SWDM technology is widely used in optical communication networks, because it has the advantages of small equipment volume, low power consumption, good dispersion performance, low cost, and high capacity. Compared with other kinds of optical transmission technology, SWDM has the characteristics of large capacity, large transmission distance and low dispersion loss, providing long distance and high speed data transmission for optical communication networks.
Conclusion
SWDM technology is an advanced optical communication technology, which can greatly improve the transmission distance, speed and capacity of optical communication networks. The technology is highly cost-effective and has strong reliability. Therefore, it is becoming more and more popular in optical communication networks.