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The KOA Series is a low noise, high performance, Fibre to the premises (FTTP) high power, multi-ports optical amplifier with a gain spectrum bandwidth within 1540~1563nm range. Each 1550nm (CATV)’s output optical port can optically multiplex with corresponding 1310/1490n’s carrier OLT PON input data stream to reduce the number of components and improve the reliability of the system.