DWDM systems using erbium-doped fiber amplifiers introduce DWDM EDFA gain flattening fiber amplifier features wide operating wavelength range of low noise figure Perfect network monitoring interface using digital communications network DWDM system technology parameters (PA) Parameter Min Typ Max Units The operating wavelength range 16channel 1546 1550 1561 nm 32channel 1535. 1562 40channel 1528. 1565 -14 .. 5 dBm input power .. .... 21 dBm output power gain 14 .. 33 dB noise figure. 5. dB input isolation 30 .. dB output isolation of 30.. dB input / output pump leakage.. -30 dBm input return loss of 45.. dB output return loss of 45.. dB polarization mode dispersion. 0.5 ps polarization dependent gain. 0.5 db power consumption .. .. 30 W Operating voltage rack:.. 220V AC -48V DC V compatible technical parameters (preamp) parameter Min Typ Max Units operating wavelength range 16channel 1546 1550 1561 nm 32channel 1535 1562 40channel 1528 1565 input power . -29 ... 5 dBm output power ... 21 dBm gain 14 .. 33 dB noise figure of 4.5 dB input output isolation of 30 dB 30 dB isolation between the input / output pump leakage........ - .... 30 dBm input return loss of 45 dB return loss of 45 dB output PMD 0.5 ps polarization dependent gain of 0.5 db power .. .. 30 W Operating voltage rack:.. 220V AC -48V DC compatible V