CATV Fiber Optical Transmitter -2mw,4mw,6mw,8mw,10mw,12mw,14mw,16mw,18mw 20mw, ... Modulation Optical TransmitterModel: LT1550 1550nm Internal Modulation Optical Transmitter LT1550 internal modulation optical transmitter uses 1550nm DFB laser as its light source ... . Mainly used in the 20-25KM transmission of television signal, digital TV ...