tailieunhanh - Incorporating Passive CWDM Technology vs.

The recent advancement in telecommunication applications for voice, video and data is placing additional demands on fiber optic networks. Adding additional fiber to existing networks can be very costly to service providers. In most cases, a far better – and less costly – option is found in coarse wavelength division multiplexing (CWDM) technology. | Incorporating Passive CWDM Technology vs. Deploying Additional Optical Fiber Incorporating Passive CWDM Technology vs. Deploying Additional Optical Fiber The recent advancement in telecommunication applications for voice video and data is placing additional demands on fiber optic networks. Adding additional fiber to existing networks can be very costly to service providers. In most cases a far better - and less costly - option is found in coarse wavelength division multiplexing CWDM technology. This paper will explain CWDM technology and its ability to add greater fiber bandwidth while increasing the flexibility accessibility adaptability manageability and protection of the network for applications up to 60 km. What is CWDM CWDM can be viewed as a third generation of WDM technology. WDM was developed as a fiber exhaust solution and traditionally employed the 1310 nm and 1550 nm wavelength signals. In most WDM scenarios providers with a fixed number of fibers had run short of bandwidth due to rapid growth and or unforeseen demand. By multiplexing a signal on top of the existing 1310 nm wavelength they could create additional channels through a single fiber to increase the network s capacity. However demand continued to increase dramatically with new innovations and applications such as the internet text messaging and other high-bandwidth requirements. This created the need for very fine channel spacing to add even more wavelengths or channels to each fiber. Dense WDM DWDM was a major breakthrough as equipment providers pushed to offer new DWDM equipment promising nearly unlimited bandwidth potential. However while DWDM was quickly adopted for long-haul and trans-oceanic optical networking its use in regional metropolitan and campus environments was in most cases cost prohibitive. A more targeted and cost-effective solution followed with CWDM a more recent standard of channel spacing developed by the International Telecommunication Union ITU organization in 2002. .