Optical transceiver which is used in rof communication system

An optical transceiver used in an RoF(Radio-over-Fiber) communication system is provided to mount both of an optical receiving device, an optical modulation device, and a patch antenna on one module, thereby reducing footprint of the optical transceiver which will be used in a base station in the RoF system. A first optical fiber(250) is a path for transmitting an optical signal from a telephone station to a base station. An optical receiving device(210) receives the optical signal transmitted form the telephone station to the base station through the first optical fiber, and converts the signal into an electric signal. A second optical fiber(252) is a path for transmitting the optical signal which is transmitted from the telephone station to the base station and passes through the optical receiving device. An optical modulation device(230) modulates an electric signal, inputted from the outside, to the optical signal transmitted through the second optical fiber. A third optical fiber(254) is a path for transmitting the optical signal, modulated by the optical modulation device, from the base station to the telephone station.