Abstract
The Coarse Wavelength Division Multiplexing (CWDM) system presented in this paper has several distinct characteristics from the standard CWDM system. One of them is the channel spacing whereby it uses smaller channel spacing compared to the standard system. The other is that, the system uses a broad spectrum laser source. The source is filtered by using ‘Bragg Grating’ before being transmitted. The filtration gives higher OSNR compared to standard CWDM setup. It was found that the system can transmit through each channel up to 2.5 Gbps with the probability of error of 10-12 . The maximum distance that can be supported by this system is about 27 km, for the data rate of 155 Mbps.
Highlights
Access network mainly comprises of the voice network, which is traditionally based on copper twisted pair cable
Even though the utilization of the access node using Coarse Wavelength Division Multiplexing (CWDM) can reduce the cost but it still cannot support the optical lines for medium and lower bandwidth user
The architecture can be used as an intermediate solution before implementing full optical lines to the home
Summary
Access network mainly comprises of the voice network, which is traditionally based on copper twisted pair cable. The optical connection is used when the coverage of copper cable cannot be supported and a high bandwidth line is needed. Optical lines will increased the price of service but by providing high bandwidth to the end user the price will be economical.
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