ORJ-1550 to modulate the photoemission machine to use in transmitting more signals and assigns to the long-distance range to the more light nodes. The XT-1550 series photoemission machine use advanced external modulator and outstanding stimulated Brillouin scatter (SBS) to suppress the technology, in addition the advanced digitization driving circuit and the processor control system, after suitable mixes the bait optical fiber amplifier (EDFA) to match may transmit the signal to amount to above 100 kilometers, still and maintains good CNR, CSO and the CTB target.