The application of fiber optics (FO) to modern radar system design is examined. This paper presents the more conventional uses of fiber optics to transmit wideband signals as well as the less common use of their stable transmission delay characteristics to form active circuit elements within a radar. The stable delay characteristics of fiber optic devices are exploited in the design of such radar circuits as a high frequency oscillator, phased array antenna, precision pulse generator, AID converter, MTI system and chirp generator. The capability of fiber optics to transmit wideband information over long distances is being exploited to develop a radar remoting system for control, power, status, voice and video signals. Three hundred signals are time division multiplexed over seven optical fibers for a distance of 1200 feet. Future development of new materials for fiber optics will permit operation at IR frequencies and lower line loss for new applications.