xWDM - ONE FIBER - MULTIPLE SIGNALS
Wavelength Division Multiplexing (WDM) increases the bandwidth and maximizes the usefulness of the fiber-optic cable. Fiber purchase represents a significant share of networking costs, so using an existing fiber to transport multiple traffic channels can generate substantial savings. If needed, the systems can be expanded so the transmission capacity gradually increases.
The technology was first published in 1978, and by 1980 WDM systems were being tested in the laboratory. The first WDM systems combined only two signals. Modern systems can handle 160 signals. Foss has xWDM pre-assembled in panel with the number of adapters and signals you need. We also have the necessary measuring equipment for measuring and diagnostic.
If you want to know more about how wavelength multiplexing works, you can read about it here.
WDM, CWDM, DWDM og OADM
The CWDM is delivered as 1U panel or as modules for 1U/3U modular panel. They are based on reliable passive technology and are delivered with SC or LC interface with PC or APC polished connectors.
The modules are inserted in a 1U or 3U panel (se separate data sheet for details). The 3U panel may be populated with up to 12 modules, the 1U panel with up to 3 modules, and they may be placed in any order in the panel. This ensures a flexible and modular system with simple access to adding modules at a later stage and also offers high density with the panel fully equipped. Each module is complete with components for two-way communication, terminated in LC connectors at the front. The panel is intended for mounting in 19” racks.
The panel is ready to be installed in 19” racks. By turning the mounting bracket it may also be installed in a metric rack. When the panel is to be placed in a 19" rack the bracket may be moved about 2 cm forward if needed. In this way the panel moves 2 cm further back in the rack. This gives more room in front of the panel, which may be beneficial for instance if the distance to the rack door is short.
You can find all our xWDM products here.
WDM Wavelength Division Multiplexing:
Uses 2 wavelengths - 1310nm and 1550nm.
CWDM Coarse Wavelength Division Multiplexing:
Uses 20 wavelengths from 1271nm to 1611nm with 20nm spaces.
DWDM Dense Wavelength Division Multiplexing
Uses up to 80 wavelengths from approx. 1528nm to 1561nm with approx. 0.4nm space. Channels are given in frequency from approx. 196thz to 192THz with 50 or 100GHz spaces.
OADM (Optical Add-Drop Multiplexer)In a system with wavelength multiplexing (typically CWDM or DWDM) OADM-components enables you to add or drop wavelengths on the way between the end points.
CWDM is used with OADM: