With the increasing demand for high-speed network applications such as 5G and cloud computing, a 100G coherent DWDM (Dense Wavelength Division Multiplexing) is also evolving rapidly, providing an effective solution for 100G long-distance optical transmission. This article helps you to understand 100G coherent DWDM.
What is 100G Coherent DWDM?
100G coherent DWDM is a cost-effective solution for long-haul networks, which can transport 100G data rate capacity over a single wavelength across long distances with high optical performance. Its solution includes 100G coherent optical modules and OTN (Optical Transport Network) transport equipment. In addition, coherent optical modules connected with a transponder/muxponder enable 100G transmission over ultra-long distances, supported by Mux/Demux, EDFA (Erbium-Doped Fiber Amplifier), and other devices. Mux/Demux connects seamlessly with a transponder, muxponder, and amplifier, forming a high-capacity and cost-effective DWDM-tailored solution. Transponder/Muxponder enables a smooth transition from 10G/40G to 100G client interfaces and allows flexibility and scalability for fiber optic connectivity in WDM(Wavelength Division Multiplexing) networks. EDFA and Raman's amplifiers are used for optical signal amplification and fiber loss compensation, allowing regional and long-distance point-to-point (P2P) connectivity.
What Technologies Are Used in 100G Coherent DWDM?
100G coherent DWDM used advanced modulation (QPSK/QAM), coherent detection, and digital signal processing (DSP) technologies. It allows DWDM networks to transform from 10G per DWDM channel to 100G per DWDM channel, which supports upgrading existing 10G/40G networks to 100G Ethernet for higher bandwidth and spectrum utilization. In addition, it provides cost-effective and highly reliable 100G optical transport. Advanced modulation has higher data rates within a given transmission bandwidth. Coherent detection has high sensitivity and spectral efficiency. DSP enables coherent transceivers to compensate for signal distortion caused by fiber dispersion, polarization mode dispersion, and carrier phase noise at little cost.
What are the Benefits of Using 100G Coherent DWDM?
1. High Bandwidth: The combination of coherent detection and DSP technology can compensate for several fiber transmission impairments, simplify link transmission, and enable high bandwidth.
2. Long Haul: Support 100G optical transmission over distances up to 1000km.
3. Seamless Upgrade: Enable seamless upgrade of long-haul optical transmission systems from 10G/40G networks to 100G Ethernet without changing the existing fiber infrastructure.
4. Cost-effectiveness: Provide better OSNR (Optical Signal-to-Noise Ratio) performance and dispersion tolerance than other line-side optical modules.
Applications
The 100G coherent DWDM solution is used in line-side optical transmission of 100G WDM systems, metro networks, long-haul networks, data centers, transport, 4K/8K video, etc.
Conclusion
In conclusion, the 100G coherent DWDM offers a cost-effective solution to meet the current and future demands of high bandwidth for data, 4K/8K video, and long-haul applications. It is highly acknowledged in the industry and has been widely deployed.
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