avelengths Spectral width CW Average output power 0.5-3 (settable) Extinction ratio GPOB B+ Diplexer: Receiver Bit rate (upstream) Mbit/s Supply voltage Operation temperature range -40 to + 85 Operational wavelengths Sensitivity (BER 10-10, NRZ) Overload power Crosstalk 1: TX power into the RX Crosstalk 2: External light power into the RX TABLE 11.3 Values of the Yields for the Various Technologies Considered in the GPON Diplexer Cost Structure Analysis Yield (%) Micro-optics GPON diplexer Hybrid integration based diplexer Monolithic InP diplexer We will adopt the performance listed in Table 11.2 for the receiver and transmitter. These are the standard performances of commercial devices of this kind, and that fit all the stan- dards requirements. The values of the yields that we have used for the different production processes are reported in Table 11.3, and are typical values for new products using already available technology modules in the respective technologies. All the other model parameters are deduced by the industrial practice, and naturally, can vary from process to process and from factory to factory, and also with regard to rel- evant quantities. The results of the cost model is reported in Figure 11.16, where the industrial cost of the four products we have considered, normalized to a common constant, is plotted versus the produced volume in a year. Since the model is quite simplified with respect to a real industrial cost evaluation, the results must be considered under the qualitative point of view more than considering the particular numerical values. The New Access Network Systems and Enabling Technologies Industrial cost (normalized units) Micro-optics Hybrid on SiO2 Monolithic on InP Electronic proc. FIGURE 11.16 Cost trend with volumes produced in a year for different types of GPON diplex- ers and for an integrated electronic cir- cuit (a high performance FPGA). Costs Volumes (log10(V)) are reported in normalized units. However, all the relevant trends emerge clearly. Up to about 400 kpieces, 