DWDM over CWDM Network DWDM technology Equipment 

HuiGoo 's CWDM and DWDM network equipment is a serious contender for today’s optical transport requirements.  It provides the following advantages:

• Low-cost initial setup with targeted future growth path
• Low incremental cost: “Pay as you grow” Architecture
• Easy conversion and upgrade capabilities up to 44+ wavelengths
• Easy upgrade to support 10Gbps/40Gbps and 100Gbps services
• Seamless, non traffic effective network upgrades 
• Provides reliable, secure, and standards based architecture
• Is simple to install and maintain
• Provides full performance monitoring

Typically CWDM solutions provide 8 wavelengths capability enabling the transport of 8 client interfaces over the same fiber. However, the relatively large separation between the CWDM wavelengths allows expansion of the CWDM network with an additional 44 wavelengths with 100GHz spacing utilizing DWDM technology, thus expanding the existing infrastructure capability and utilizing the same equipment as part of the integrated solution.

Additionally, the typical CWDM spectrum supports data transport rates of up to 4.25Gbps, while DWDM is utilized more for large capacity data transport needs of up to 100Gbps.  By mapping DWDM channels within the CWDM wavelength spectrum as demonstrated below, much higher data transport capacity on the same fiber optic cable can be achieved without any need for changing the existing fiber infrastructure between the network sites.

As demonstrated by Figure 1.0, CWDM occupies the following ITU channels: 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm, and 1610nm, each separated from the other by 20nm. PacketLight can insert into any of the of the 4 CWDM wavelengths (1530nm,1550nm,1570nm and 1590nm), a set of additional 8 wavelength of DWDM separated from each other by only 0.1nm. By doing so up to 4 times, the CWDM network capability can easily expand by up to 28 additional wavelengths.