It can be widely used in CATV system and Wide Band photo-electric conversion system. The core components are manufactured by world-famous companies such as ORTEL,LUCENT, MOTOROLA, PHILIPS, AOI. The output optical power of these series products include 4～25mW. It permanently works at optimal status because of laser power & temperature control circuits. VFD module accurately displays laser power, bias current, temperature in laser module and so on. 19″standard case, easy to install. It is provided with reliable switching power supply. Laser module is protected from damaging by current pulse or failure of control circuit. AGC/MGC circuit and predistortion circuit for selection;