Tag Archives: DWDM 40CH multiplexer

Using 40 CH DWDM MUX/DEMUX for 500G Network

WDM technologies are considered to be the most cost-effective solution to expand the existing network without adding additional fiber optic cable. The two types of WDM architectures—CWDM and DWDM have already been widely deployed in current network systems and can support 40G/100G network easily. DWDM has advantages over CWDM as it can multiplexing more wavelengths.

Does 40-Channel WDM MUX/DEMUX Stop at 400G?

For the traditional 40 CH DWDM MUX/DEMUX, each port is connected to a transceiver by a length of patch cable. Currently the most commonly used optics for DWDM are 10G SFP+ modules. Thus, for a 40 CH MUX/DEMUX, up to 400G can be reached by using forty 10G DWDM SFP+ modules. Is that the limitation of DWDM network? One of the most significant spirits of this industry is challenging the limit of data rate. Actually, with a small change on the DWDM MUX/DEMUX, the capacity of DWDM network can be largely increased and it doesn’t cost much. This post will take an example of the most commonly used DWDM MUX/DEMUX which has 40 channels (from C21 to C61) in a 1R rack. But the 40 CH DWDM MUX/DEMUX that we use is a little different from the traditional ones.

That’s the Beauty of 1310 nm

The difference laying at the front panel of the 40 CH DWDM MUX/DEMUX—a pair of 1310 nm port is added to the device. And this is the key point why we can move another step on forward the way to increase DWDM network capacity. The following picture show the logical setup of this 40 CH DWDM MUX/DEMUX.


The 1310nm port can be used for 40G/100G transceivers, like 40GBASE-LR4/ER4 or 100GBASE-LR4/ER4 transceivers. The 40G/100G signals can be multiplexed with the other 40*10G signals on the other 40 channels. Together with this pair of 1310 nm port, a 40 CH DWDM MUX/DEMUX can run up to 500G.

The beauty of this port is not limited to data rate increasing. It can also save a lot of money and spaces. You do not need to add another 10 ports and 10 pairs of SFP+ modules for additional 100G transmission. No change in the cabling infrastructure is required. Just a pair of 100G optics and a pair of patch cables, you can get another 100G service. The following picture shows the application of this 40 CH MUX/DEMUX with 1310nm port. (Click the picture to enlarge it.)

40CH DWDM solution

Cabling Solution for 40 CH DWDM MUX/DEMUX With 1310nm Port

Here offers the detailed cabling solution for this 40CH DWDM MUX/DEMUX with 1310nm port. Kindly contact sales@fs.com for more details.

Item Number ID# FS Part Number Item Description
1 35887 40MDD-1RU-A1-FSDWDM 40 Ch 1RU Duplex DWDM MUX DEMUX C21 to C60 with 1310nm Port and Monitor Port
2 14491 DWDM-SFP10G-40 10GBASE 100GHz DWDM SFP+ 40km, LC Duplex Interface, C21 to C60
31533 DWDM-SFP10G-80 10GBASE 100GHz DWDM SFP+ 80km, LC Duplex Interface, C21 to C60
14599 DWDM-XFP10G-40 10GBASE 100GHz DWDM XFP 40km, LC Duplex Interface, C21 to C60
14650 DWDM-XFP10G-80 10GBASE 100GHz DWDM XFP 80km, LC Duplex Interface, C21 to C60
3 35208 QSFP-LR4-40G 40G QSFP+ LR4 1310nm 10km, LC Duplex Interface
35210 QSFP-ER4-40G 40G QSFP+ ER4 1310nm 40km, LC Duplex Interface
35014 CFP2-LR4-100G 100G CFP2 LR4 1310nm 10km, LC Duplex Interface

CWDM in hybrid access network in the use of the business

With the improvement of people’s living standard, nowadays a single network access gradually cannot satisfy people’s demand for network now, CWDM system support for the characteristics of business more and more get the attention of people, can also provide E, FE, GE, STM 1/4/16 SDH and ATM signaling, CATV video interface and other businesses such as access CWDM system solutions, to meet the requirements of people now.

Radio and television networks in recent business growth is faster in a given area, is the region development education network access project, due to the previous optical fiber network resources is mainly used in cable television network, optical fiber resources is not so rich, many county to the town had no residual fiber resources, to increase the data business, now want to be in the original on the fiber optic cable TV network transmission using again, plus information data signals, or want to lay out the other cable the main work, need to solve as many towns in this area belongs to mountainous area, cable laying is not very convenient, considering various factors such as resources, cost, on the radio and television networks company specialized in optical network access technology co., LTD. Shenzhen Fiberstore CWDM system to conduct a comprehensive performance analysis and product testing.And start in areas such as education network access to a project on each node USES many Fiberstore CWDM system equipment.


The radio and television networks of CWDM project at present is mainly used to implement the education network (10/100 MBPS Ethernet) hybrid transmission signals and the cable television network, the current direction of projects with a total of eight different contact, sharing the 3 sets of Fiberstore the CWDM system equipment.

In this scenario, A computer room – B node transfer 2 10/100 MBPS data signals and A cable TV signal, which is based on WDM CWDM access, two 10/100 MBPS signals after Fiberstore C5002S through Fiberstore HA – WDM multiplexer, and cable television signals and reuse all the way to A single fiber, transfer to the access point B region, middle transmission distance of 50 km, implements and Ethernet cable TV signal on the single fiber CWDM module of hybrid transmission.

A room – C nodes use sea pegatron C5002S system combined with high speed and CWDM terminal transceiver effectively cooperate with access, realize two-way 10/100 MBPS of hybrid transmission over A single optical fiber.
A-D-E by Fiberstore C5004S system combining various nodes of high speed and the corresponding CWDM transceiver implementation 4 10/100 MBPS signals on A single optical fiber access project, through the high speed connection between each contact, through the terminal CWDM wavelengths optical transceiver connected to A contact switch, after the C5004S system in the computer room 4 different signals, respectively in different wavelengths transmitted to each destination, after D primary school, through high speed download local signal, the remaining 3 to continue down the road signal to the corresponding destination.

Save fiber resources CWDM (Coarse where division multiplexing) Coarse wavelength division multiplexing system, which USES optical multiplexer in the different optical fiber transmission wavelength multiplexing in a single fiber transmission;On the receiving end of A link, using wavelength multiplexer and then revert to the original wavelength, using optical fiber all the way, on the whole link is solved effectively under the condition of the optical fiber resources extremely nervous network access, this scenario, A, D, E, between transmission on A single fiber and four 10/100 MBPS (also can be 1000 MBPS) signal, A room – B node is in the original cable TV signal transmission on A single fiber loading 2 10/100 MBPS signals, save A lot of fiber resources. 2.More business and high bandwidth CWDM is a according to the practical application to the transfer rate of adaptation based transmission platform, support a variety of business transfer.At each wavelength, the support of the business including 10 m / 100 m / 1000 m Ethernet, 155 m / 622 m / 2.5 G of SDH, 155 m / 622 m ATM business, as well as the Fiber Channel business, and so on.The whole system capacity to play a few Gbps data signal.Fully meet user bandwidth requirements in quite some time.This scenario USES is 10/100 MBPS business with cable TV signal for hybrid transmission.

CWDM system than the price of L band DWDM transceiver is relatively low, due to the power of CWDM is small, small volume, easy to use, thus supporting facilities, personnel training and the late maintenance cost is low.Compared with optical cable project: using CWDM device is opened rapidly, low cost, convenient network upgrades, late and increasing need of signal directly, or replace the higher rate of product, don’t need to change the fiber link, convenient network upgrades, reduces the network upgrade costs.The above scenario A-D-E, if change into 1000 MBPS data signals, the capacity of the network directly to upgrade to the 4 GBPS.
CWDM in hybrid access network in the use of the business.