Abstract
This paper presents the study on the effect of filter variation on the coarse wavelength division multiplexing (CWDM) system. The filter curve will affect the performance of the CWDM system due to changes of received power lever and isolation of the signal. The significant impact on the received power level and isolation can be found when the required signal is isolated from unwanted signal by the steep curve of filter. As a result, BER of 1.0x 10-12 was obtained corresponding to receive power level of -24.27 dBm with isolation of 23.22 dB. When the wavelength spacing is reduced to 1nm, the isolation is only 11.30 dB and BER increased to 5.49x10-7 with a received power of -15.39 dBm.
Highlights
Internet growth and expansion has becoming dense in access network [1, 7]
The study demonstrates the effect of filter curve on the performance of the new coarse wavelength division multiplexing (CWDM) system on the access network
The new system can achieved a distance of 40 km at 1.6 nm spacing with data rate of 2.5 Gbps
Summary
Internet growth and expansion has becoming dense in access network [1, 7]. The migration of copper to optical network is already an obsolete solution. The CWDM system gives opportunity for the existing network installed to be fully utilized. Isolate the adjacent signal will reduce the received power and the transmission distance as well. The received power level and isolation of the signal is investigated where the variation of these parameters contribute by the filter curve. The shape of the filter in the system setup (refer to Figure 1) is the main contributor to the isolation and the received power level of the system. These parameters will contribute on the performance of the system which BER of the system is investigated due to changes of isolation and received power level. The parameters under study were received power and isolation with respect to filter’s curve
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