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Optical Network Development Large bandwidth has become the most basic requirement for communication networks

With the growth of global broadband services, large bandwidth has become the most basic requirement for communication networks. The development of 100G is in full swing. Recently, several optical device manufacturers announced quarterly financial reports. MACOM announced first-quarter sales revenue of US$114.9 million, including Revenue from sales of 100G optical products rose by 35%. Oclaro reported its second quarter 2015 financial results. During the quarter, Oclaro’s sales revenue from 100G was approximately US$33.7 million, which exceeded the US$32 million of 10G and lower-speed products. JDSU’s recently announced second-quarter financial report for fiscal year 2015 showed that sales revenue from 40G and 100G products increased by approximately 30% year-on-year. It can be seen that 100G demand has become the main driving force for the growth of sales revenue of these optical device vendors.

However, with the further development of optical networks and people's endless demand for speed, Super 100G will become a new research hotspot for operators and equipment manufacturers around the world. How to create a higher-speed optical network that can meet future development needs? The industry has started the research of ultra-100Gb/s transmission technology since a few years ago. 400Gb/s and even 1Tb/s technologies have begun to appear in people's sights. The development of 100G is in the prime period and the ultra 100G. The era has come quietly.

Super 100G

According to industry insiders, according to the current traffic development trend, the network traffic will increase by nearly 40% in the next five years, and the transmission network will be dominated by 100G. However, by 2017, the maximum cross-section transmission bandwidth of the backbone network is approximately 38Tb/s, which requires 5 For 80-wavelength 100G systems, 400G is a more reasonable choice as long as it is feasible. In the next 5-10 years, network traffic will increase by about 30% annually. High-traffic areas will require 45-125Tb/s. As long as it is feasible, 400G should be the dominant rate. .

Research institutes at home and abroad have started research on ultra-100Gb/s transmission technology based on 400Gb/s, 1Tb/s, or even higher speeds a few years ago. In March 2013, the IEEE 802.3 400GE standard was successfully established. Some demonstrations and trials are already in progress, while some operators choose to upgrade to 200G.

In 2014, domestic operators have begun research and testing of ultra-100G WDM systems such as 200G, 400G, and 1T, and the scale will be further expanded in 2015. With the support of the “863” project, China Telecom conducted a number of transmission experiments on ultra-100G WDM systems with various signal rates such as 400G and 1T under various fiber optic environments and various networking conditions. The international high levels such as OFC and OECC were implemented. At the horizontal academic conference, several papers were published.

From September to November 2014, China Telecom carried out laboratory tests on 400G WDM systems from mainstream vendors such as Huawei and Alan. China Mobile completed 400G laboratory tests in the first half of 2014, including four equipment manufacturers and four types of fiber hybrid laboratory tests. China Mobile will launch a 400G pilot network in the second half of 2014. Operators' experiments show a strong interest in super 100G WDM transmission technology.


In the long term, 100G technology still cannot meet the rapid growth of China's mainline network traffic. According to the consulting firm RHK, the global ultra-100G market will start in 2014-2015 and will be deployed in some hotspot areas in the operator's trunk network in 2015, and it will enter a rapid development stage in 2018.

At present, major transmission equipment manufacturers have been able to provide 400G transmission equipment and 400G solutions. For example, Huawei, Alcatel, and Ciena have released 400G technology-based modules. The standardization of 400G is also being promoted by various standardization organizations, in particular, the development of 400GE standards. The IEEE 802.3bs working group was formally established, marking the 400GE and the entire 400G related standardization work entering the fast lane.

Conclusion: The current industry's extensive research in the ultra-100G, it can be predicted that in the next few years, 400G will also start the curtain of commercial scale. The development of technology and the demand of the business will push the optical network to advance at a higher rate and the development of the business leads the demand. This is the eternal direction of the development of the optical network. It is believed that as the technology and standards of Super 100G become more and more standardized, the development of optical networks will reach a new height.

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