CWDM used to be the popular choice in low capacity, short distance and low rate (up to 10G per wavelength) applications, as well as in networks where the initial requirement does not exceed 8 wavelengths. In addition, low cost entry point and the difference in economic scale make CWDM ideal for initial network set up. However, CWDM is limited as it cannot be amplified and does not support tunableDWDM 100G/200G/400G wavelengths. As the need for capacity grows, so does the demand to increase capacity by adding DWDM onto existing CWDM infrastructure. For more details, see DWDM overCWDM Network.
HTF support customized solution dwdm/cwdm/OTN solution design, 10G/100G/200G/400G dwdm , DCI-BOX, White box dwdm, help you expand network capacity easily.
The components of a traditional DWDM system consists of the transponder, multiplexer/de-multiplexer, optical add/drop multiplexers, and optical amplifiers.
DWDM components Below is a high level overview of the process in which data is transmitted using DWDM and what each component’s function is within the system: 1. The data stream comes in via the router and is input into the transponder. 2. The transponder maps the signal to a DWDM wavelength and sends it to the multiplexer (Mux) to consolidate the optical signal. 3. As the signal leaves the multiplexer, optical amplifiers boost the signal to allow the signal to travel over longer distances. 4. Along the way, optical add/drop multiplexers (OADM) can add and remove bitstreams of a specific wavelength. Also, additional amplifiers can be used to further boost the signal’s distance. 5. The signal the arrives and gets de-multiplexed (DeMux) into individual DWDM wavelengths, which are then passed through the transponder to be converted into the corresponding signals to be routed to its final destination.
HTF support customized solution design, 10G/100G/200G/400G dwdm , DCI-BOX, White box dwdm, help you expand network capacity easily.
1. Huawei: As one of the world’s leading telecommunications equipment suppliers, Huawei has a wide range of product lines in the field of optical transmission networks, including OSN 9800, OSN 1800, OTN products, etc.
2. ZTE (ZTE): As one of China’s leading telecommunications equipment suppliers, ZTE has a complete product line in the field of optical transmission networks, including ZXONE 8000 series, ZXONE 9700 series, ZXONE 9700 V6 series, etc.
3. Ericsson: As one of the world’s leading telecommunications equipment suppliers, Ericsson provides WDM optical transmission solutions in the field of optical transmission networks, including SPO 1400, SPO 1460, SPO 1410, SPO 1461 and other products.
4. Fujitsu: As a well-known optical transmission equipment manufacturer, Fujitsu provides complete WDM optical transmission solutions, including FLASHWAVE series, PACKET OPTICAL TRANSPORT series and other products.
5. Alcatel-Lucent: As a world-renowned communication equipment supplier, Alcatel-Lucent provides a variety of optical transmission network products, including 1626 Light Manager series, 1660 SM series, 1850 TSS-320 and other products.
6. H3C Communications (H3C): As one of China’s leading network equipment suppliers, H3C Communications provides a variety of optical transmission network products, including XFP series, SFP series, 10G series and other products.
7. FiberHome: As one of China’s leading optical communication equipment suppliers, FiberHome provides a variety of optical transmission network products, including FH-OTN series, FH-DWDM series, FH-S10 series and other products.
8. Tellabs: As a well-known communication equipment manufacturer, Tellabs provides a variety of optical transmission network products, including Tellabs 7100 series, Tellabs 6300 series, Tellabs 532L and other products.
9. Nokia: As a world-renowned communication equipment supplier, Nokia provides a variety of optical transmission network products, including 1830 PSS series, 1830 PSI series, 1626 LM and other products.
10.HTFuture (HTF): About HTF, the company was founded in 2002. It is an enterprise focusing on the research and development, production and sales of optical communication equipment. Its main product series include HT6000 series and HT6800 series, which can realize flexible networking, fast service provisioning and powerful network management functions. HTF support customized solution design, 10G/100G/200G/400G dwdm , DCI-BOX, White box dwdm, help you expand network capacity easily.
Today we will talk about the application of wavelength division transmission equipment in data center computer rooms.
Foreword: HTF is the first choice for optical fiber expansion. We are a service provider with fifteen years of experience in the optical communication transmission industry, serving more than 1,000 industry customers, and providing customers with professional, stable and reliable optical transmission solutions — HTF.
Today we will talk about the application of wavelength division transmission equipment in data center computer rooms.
The Internet has developed rapidly in the past ten years, and various APP applications have emerged one after another. You can accomplish all kinds of unimaginable things without leaving home. If you don’t want to travel, you can see the scenery of Mount Everest online in real time through your mobile phone or TV at home. Doctors can Perform operations on patients thousands of miles away through remote control, or order takeout if you don’t want to and have steaming hot food delivered to you within half an hour. All these conveniences and high efficiency are inseparable from the support of the data center behind it.
Various apps, various softwares, or Internet technologies all need to be carried by hardware. Apps are carried by mobile phones, and public software services or cloud computing/big data/artificial intelligence/blockchain, etc. are carried by IT hardware. IT hardware all lives in a place called a data center.
Houses are for living in, but not necessarily for people to live in. A data center is a house specially used to house various IT equipment. The data center’s floor plans, wind, water, electricity, temperature and humidity, and fire and theft prevention are all designed to make the machines comfortable and machine-oriented.
Data centers are the infrastructure and real estate of the IT industry. The development of Internet technology has placed increasing demands on these infrastructures. The residents of the data center are servers, storage, switches and security equipment, etc., and the property management personnel are the operation and maintenance personnel of the data center. The data center provides computing or storage services to the outside world. Servers, PCs, smartphones, etc. also provide computing and storage services to the outside world, but the data center is larger and the shell is made of buildings instead of plastic. In fact, a data center is an oversized computer room with many servers dedicated to centralized management (storage, calculation, and exchange) of data. Data center, the English abbreviation is IDC, which is Internet Data Center.
One of the bandwidth costs of the data center is the cost of optical cable resources. The more optical fiber cores you rent, the more expensive it is. Wavelength division transmission equipment can be directly multiplexed and expanded on the original 2-core optical fiber, and the 2-core fiber can be transformed into 20-core, 40-core or even 80-core. . At present, most IDC customers already know that wavelength division can be used to solve the problem of insufficient optical cable resources.
2. Build a backbone network
Due to the large bandwidth of the upper backbone network of the data center, a single port exceeds 100G. If wavelength division equipment is used to build the network, a maximum bandwidth input of 80X100G/200G and a maximum of 16T can be achieved, which can meet the bandwidth output between cities, or between certain cities. Bandwidth entry and exit needs of some small countries.
3. Pure transparent transmission, low latency
Most of the customers in the data center have relatively high network requirements, such as bank customers, who have very high latency requirements. Since the wavelength division transmission equipment is purely transparent and does not perform any analysis and processing on the data, it only produces extremely low latency. When transmitting 100 kilometers, the delay is about 1 millisecond, so for high-end users in data centers, transmission equipment is a good choice.
4. Suitable for ultra-long distance transmission
Many data center services span multiple cities, and some even cross provinces and countries. The transmission distance is tens or hundreds of kilometers, or even thousands of kilometers. The longer the distance when laying optical cables, the higher the rental cost. At this time, the wave The transmission equipment can play its maximum value. The farthest ring network our transmission equipment has built overseas is more than 3,000 kilometers, surrounding the entire country and passing through more than 40 computer rooms. Currently, the equipment has been running stably for 6 For more than a year, users will need to upgrade and expand the wavelength division ports.
After talking so much, friends in the data center industry, do you want to buy this cost-effective 100G/200G/400G DWDM? Welcome to contact HTF, www.htfuture.comivy@htfuture.com +8618123672396
With the vigorous development of digital infrastructure and innovative business applications such as computing power networks, the Internet of Things, and data centers, the demand for networks continues to grow, which has given rise to the demand for large-traffic interconnection between cross-regional nodes and centers and promoted the further evolution of backbone transmission technology. upgrade. Under this opportunity, 400G backbone all-optical network technology has been widely discussed by academia and industry in recent years. This technology is also generally considered to be the future development trend of backbone transmission networks.
With the rapid development of artificial intelligence, big data, cloud computing and other technologies and the large-scale construction of the “Eastern Digital and Western Computing” project, the network is undergoing unprecedented changes. Around 2008, the concept of all-optical networks first appeared in China, and building all-optical networks and all-optical cities became a vision across the country. Since 2013, 100G OTN has been widely used and has been used for 10 years. However, the core requirements of a computing power network are large bandwidth, low latency, and wide connectivity, so that the network can reach everywhere, computing power can be everywhere, and intelligence can reach everywhere. Facing the current huge computing power network market demand, traditional 100G is obviously unable to meet the new needs of users for related services. Against this background, all ends of the industry chain are actively promoting iterative development in technology, standardization, etc., seeking a more solid foundation for optical networks with higher speeds, larger capacities, and lower energy consumption. 400G, which is currently attracting much attention from the industry, is generally considered to be the next major revolutionary intergenerational technology for backbone networks, and is expected to become the “optical base” in the era of computing power networks.
“Data show that global Internet traffic continues to grow at a rate of 26% every year; and Internet users are also growing massively, resulting in the emergence of massive 5G interconnection equipment and new bandwidth-intensive applications.” According to Zhang Chengliang, president of the China Telecommunications Research Institute, the current The network architecture is changing: CDN is moving down, DCN is being built, and east-west traffic is increasing. The Internet has shown new characteristics in that video services are the mainstay, and the traffic of mid-range metropolitan area networks and data centers exceeds that of long-distance backbone networks. The rapid growth of Internet services has driven the development of large-capacity transmission technology. The next generation backbone network will adopt the 400G QPSK@150GHz technical solution.
As the core carrying technology of the next generation backbone network, 400G increases system bandwidth by 4 times compared with 100G OTN, transforms transmission from “single lane” to “four lane”, saves power consumption by more than 10%, and reduces latency by 10%. It is equivalent to laying a “viaduct” on the “Computing Network Expressway”, which can realize the efficient circulation of computing power across regions and truly achieve strong computing through the network.
HTF（www.htfuture.com) aim to help build the 100G, 200G, 400G OTN transmission, expand the network capacity. Any project, welcome to contact HTF sales team.
To explain how DWDM works, we first need to explain how the WDM works. Wavelength-division multiplexing, or WDM, uses a multiplexer to join several different data streams and convert them into wavelengths of light before transmitting it over the fiber optic cable, which is then de-multiplexed at its receiving end and split back into its respective streams of data.
How DWDM works
Being a dense form of WDM, DWDM uses the same multiplexer to de-multiplexer transmission method, except that it can fit much more channels. To put that into perspective, if each channel carries 100Gbps of data, then at 160 channels per fiber cable, DWDM can essentially have a capacity of 1.6Tbps of data per fiber cable.
Any questions, welcome to contact Ivy from HTF. ivy@htfuture.com +8618123672396
Dense wavelength-division multiplexing (DWDM) is an optical transmission technology that uses multiple wavelengths of light to combine several data streams onto a single optical fiber. DWDM is a subset of wavelength-division multiplexing (WDM) that typically uses the spectrum band within 1530nm and 1625nm, or more commonly the C-band and L-band, to input 40, 88, 96 or even 160 wavelengths, or channels, onto a single strand of fiber optic cable.
DWDM wavelength spectrum
DWDM got its name from using tighter wavelength spacing (dense) to fit more channels, with each channel being only about 0.8nm wide. This is opposed to its WDM sibling, CWDM, where it uses a wider range of frequencies, with each channel spread farther apart. With a CWDM channel being 20nm wide, the high number of channels available to DWDM means it can cram much more data into the cable.
Any questions, welcome to contact Ivy from HTF. ivy@htfuture.com +8618123672396
How to chooseDCM in DWDM system solution? How to know the compensation length for the link? How to calculate that if I use the 80km DWDM SFP+?
You can use the following method to calculate the compensation length, as a reference to select the DCM you need. The link distance minus the transmission distance of the optical module is the minimum compensation distance, on this basis need to add 20km to ensure enough compensation.
For example, if the transmission span is 135km, the compensation length is 75km (135km - 80km + 20km = 75km), which means you can choose a DCM whose compensating length is 80km.
If have DWDM requirement, welcome to contact HTF. support@htfuture.com SKYPE/Whatsaspp/Wechat: +8618123672396
The 200G Muxponder Transmitter card supports two QSFP28 Client interface and one CFP2 line-side interface to support single-channel 200Gbps large grain data transfers.The industry’s most advanced coherent technology and FEC forward error correction coding technology enable high-capacity, long-distance high-performance transmission.
It allows maximum flexibility and scalability for fiber optic connectivity in wavelength division multiplexing (WDM) and dark fiber applications and provides ideal solution for enterprise, data center, campus and metro networks.
The 200G Muxponder service card launched by HTF. supports 2x100G↔200G electric layer multiplexing / demultiplexing, and converted to a 200G WDM standard wavelength optical signal, so as to facilitate the wavelength division multiplexing of optical signals of different wavelengths by the wave combining unit, and realize the inverse process of the above process. The line side adopts DP-8QAM or DP-16QAM modulation mode, coherent reception and other advanced technologies to overcome the challenges of high-speed transmission system for OSNR requirements, Cd tolerance, PMD tolerance and non-linear transmission physical effects. It can achieve a maximum of 800KM of no electrical relay transmission, and support C-band 96 wave (50GHz) tunable.
HTF will help you to design the DWDM solution base on your real using enviroment. ivy@htfuture.com +8618123672396
1. What‘s the fiber type in your network connection? Can you tell if fiber is single fiber or dual fiber?
Fiber Type
G.652
G.655
Other
Number of fiber
Single fiber
Dual fiber
Other
Other requirements (Optional)
2. How many spans are in the whole link? And what‘s the business plan between them?
Spans in the whole link
Initial point
Termination point
Business Capacity
Distance
Loss@1310nm or Loss@1550nm（Please enter at least one item）
Add another
3. Do you have any upgrade plans to expand network capacity for future business? (Optional)
Leave a message for other project descriptions in detail
4. Do you have additional requirements like Network protection, Monitoring, and other customized demands?
Additional requirements
Optical Line protection
1+1 hot-backup protection
Optical Performance Monitoring
Other
Other customized demands (optional)
Enter more details
With these information, HTF will assist you design the suitable DWDM solution, help you expand network capacity and save cost. ivy@htfuture.com +8618123672396
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