The utilization of fiber optic cables for communication has opened up gates for communication multiplexing technologies that increase the capabilities at minimum costs. Coarse wavelength division multiplexing (CWDM) modulates different wavelength laser beams with multiple signals. Essentially, what this means is maximized utilization of a single fiber optic to deliver and get a large number of signals, minimizing costs for telecom companies. Companies simply employ the right optical amplifiers, multiplexers and demultiplexers to boost capacity from the fiber optic using CWDM technology.

In CWDM technology, it comes with an increase in channel space. This means requirement of less sophisticated and less costly transceiver devices. Operating in the same window of 1550 nm and making use of OH-free silica fibers, maximum efficiencies are achieved in channels 31, 49, 51, 53, 55, 57, 59 and 61. The channels are spaced 20 nm apart. DWDM spaces them 0.4 nm apart. Less precision optics minimizing cost, uncooled lasers with lower maintenance requirements can therefore be used in CWDM devices, operating in the region of 1470, 1490, 1510, 1530, 1550, 1570, 1590 and 1660nm. 18 different channels can be used with wavelengths as much as 1270 nm. For instance, a 8 channel CWDM includes 8 different CWDM channels. In addition to being economical, power consumption for laser devices used in CWDM technology is also far less.

CWDM signals cannot be transmitted long term but are ideal for applications inside a range of 60 km for example in a city as well as for cable tv networks allowing upstream and downstream signals. CWDM product is usually considered a low-cost alternative which is now widely used to replace the DWDM system. Due to the benefit of CWDM technology uses low cost lasers that don't need cooling and low-cost passive filter. Moreover, if using CWDM technology, we can use low-cost and smaller transceivers such as CWDM 10Gig SFP+. However, because of relatively large CWDM channel spacing, so the system will reduce the number of available wavelengths, this also limits the system's transmission capacity.

Related technologies are dense wavelength division multiplexing (DWDM) and conventional WDM. Conventional WDM use the 3rd transmission window with a wavelength of 1550nm, accommodating as much as 8 channels. DWDM is identical however with a higher density channel. Systems could use 40 channels, each at 100 GHz spacing or 80 channels spaced 50 GHz apart. A technology, the ultra dense WDM is capable of doing working in a spacing of just 12.5 GHz, allowing more channels. However, DWDM and WDM are much more expensive in contrast to CWDM.

A quantity of manufacturers offer all related CWDM multiplexer, demultiplexer and optical amplifier. Networking solution providers would be the right individuals to seek guidance for use of CWDM, DWDM or WDM technology. They perform entire installation and commissioning from the right, integrated devices for error-free high speed, high data transmissions over fiber optic cables. Cost and gratifaction optimized CWDM solutions with built-in expansion capabilities can be found from reliable and trusted online network solution companies. Choose the best one with years of experience and technological expertise to provide the best CWDM solution and use the CWDM technology to construct your cost-effective fiber optic networks.