This laser transmitter is important equipment to built CATV HFC network. It is mainly used for long distance optical fiber transmission of television signal, digital TV signal telephone voice signal and data. High performance DFB laser , we select famous brand from the international market for our products as light source. RF power digital automatic processing tech-nology developed and operated by ourselves and RF pre-distortion circuit are used in the part of RF drive. Microcom-puter automatic control system is built-in it to ensure excel-lent performance.