Semiconductor optical amplifiers (SOAs) provide a cost-effective optical amplification scheme at 1310 nm. Although they have already been used in enhancing the performance of high-bit-rate digital systems, their use in CATV systems has been limited so Jar because of their distortion performance. However, recent research suggests that this can be overcome by using a new technique called 'gain-clamping'. In this paper, we will review the performance of presently available SOAs and discuss their performance enhancements using gain-clamping. We will then indicate potential applications of SOAs along with some applicable system tradeoffs with special emphasis on analog networks