Analysis of Signal to Noise Ratio and Bit Error Rate Parameters of Optical Fiber Communication Backbone in Lamongan-Kebalen Segment

摘要

Optical fiber has been used to fulfil the increasing need of high speed and high capacity data transfer. With 4.3 millionusers and 18.3% growth projection per year, fixed broadband sector of PT Telkom Indonesia relies on the quality of fiberoptic backbone infrastructure, which represented by the Signal to Noise Ratio (SNR) and Bit Error Rate (BER). So, it isnecessary to analyze SNR and BER parameters of fiber optic backbone in the segment between STO Lamongan 1 andSTO Kebalen, Surabaya. SNR is logarithmic ratio of received signal and noise power, while BER is the measure ofincorrect bit identification probability. The measurement process taken in STO Kebalen`s receiver by connecting BERTester into one of the DWDM ports in Optical Transport Network (OTN) platform for 24 hours. It showed the result ofBER 10~(-23). To better analyze SNR and BER parameters completely, it needs a simulation brought by Optisystemsoftware. The 100 Gbps, 84 km, 10 channels DWDM backbone is simulated in 193.1-194 THz with 100 GHz offrequency spacing. Parameters of the simulation are following the characteristic of the backbone itself and componentsdatasheets. WDM analyzer and BER analyzer are used as measurement instrument. The simulation shows that SNR andBER of the system is acceptable based on standards and different at each frequency or wavelength channel. MaximumSNR is 72.37 at 193.6 THz, while minimum BER reaches 2.05 × 10~(30) at 193.5 THz. To obtain the optimum BER of10~(-12), two kinds of treatment, dispersion compensating fiber installation and transmitter power addition on 193.1, 193.2,193.9, and 194 THz are simulated.