Radio Over Fiber (RoF) Implementation using MZM For Long Distance Communication

The performance of radio over fiber (RoF) links using low cost optoelectronic components is assessed for distributed antenna applications in next generation wireless systems. Important design issues are discussed and an example link design is presented for a wireless system requiring the transmission of one radio channel per link direction, the proposed optical fiber system is designed to transmit 2 Gbits/s over 5000 km. 1300 nm wavelength is used in the proposed system and single mode optical fiber. Firstly, a random data, RZ pulse generator, 10 dBm 1300 nm laser sources and Mach-Zehnder Modulator (MZM) are used to transmit the 2 Gb/s. The initial link was proposed by using 50 fiber cables are connected every single cable has length of 100 km. Therefore, the total link becomes 5000 km. 50 optical EDFA amplifiers with power of 20 dB have used to amplify the transmitted light power. The results that the received data has BER of $4\times 10-37$ by using RZ pulse generator, provided that the wireless system has uplink power control. Finally, a comparison was made between and performance of RoF links for this application and alternative link types that use digitized radio transmission and show that RoF is the optimum choice from a cost perspective..