input pump, which is much smaller than individual SOA polarization dependence. Secondly, the worst contrast ratio still yields -6.5 dB for an input contrast ratio 10 dB, which is still larger than the contrast ratio of the TE input for a single SOA. The residual 1.1-dB polarization dependence is attributed to the two SOAs not being perfect matched. Figure 3(a) shows the polarization dependence ...

tac (time to amplitude convertor) is one of the most important time measurement instrumentswhich has great significance in many fields of science, especially radiation physics. a tac unit has beendesigned based on the start-stop analog method and nim (nuclear instrument modules) standards. afterdesigning the circuit, it was simulated by pspice software and constructed by discrete and integrated...