the ORJ - 1550 series to mix the bait optical fiber amplifier (EDFA), with by modulates the photoemission machine coordination use with 1550mm outside, the transmission cable TV signal, this product selects the high quality to mix the bait optical fiber, the high power pump source, with the disconnector, the coupler, the wavelength division multiplying and the outstanding control circuit combination becomes, guarantees the complete machine the stability, and in time high gain, high power output, still maintained the fine noise factor, the pre-amplification and relaying enlarge unify may transmit above the signal 100km kilometer.