5 An optical fiber communication link (point-to-point) need to be laid for new telecommunication company. The transmission distance is 50km with 10Gbps non return zero (NRZ) optical signal. The bit error rate (BER) is 109 and the minimum system margin is 5dB. Table Q5 shows the characteristics of the optical network. As an engineer you are required to: (i) Draw and label the optical network using suitable block diagram. (ii) Determine the power as well as the bandwidth budget. (iii) Comment on the outcome of the design. Table Q5: Characteristic properties of the devices \begin{tabular}{|l|l|} \hline Transmitter: & DFBlaser=1580nm,outputpower=10mW,risetime=76ps,spectralwidth=0.7pm,couplinglosstofiber=7dB. \\ \hline Fiber: & Singlemodefiberavailablelengths=7km,attenuation=0.2dB/km,dispersion=20ps/(km.nm) \\ \hline Connectors: & Loss=1dB/connector(oneatthetransmitterandoneatthereceiver) \\ \hline Splices: & Loss=0.2dB/splice \\ \hline Detector: & InGaAspinRC-limitedbandwidth=4GHz,couplinglossfromthefiber=1dB,receiversensitivity=25dBmforBER=109 \\ \hline \end{tabular}