Optical Transmitter(TX) will convert the RF signals into Optical Signal.The optical Transmitter works on the principle of direct modulation. A typical link consists of an optical transmitter that receives the RF signal, transmits it over a single mode fiber to an optical receiver and reconverts the optical signal to RF. This Radio over Fiber Modules is suitable for Telecommunications, Antenna Remoting, Optical Delay lines & Radar Applications. These modules can be used as Optical Distributed Systems in Radar application. By using these modules communications can be established from meters to few Kilo meters long Distances. Transceiver modules have small form factor therefore they are easily accommodated in less space.