基于综合光学调制技术的光纤无线双向通信系统设计

提出并研究了一种使用单光源的光纤无线双向传输系统.该系统只需在中心站配置一个可调谐激光器,以产生频率恒定的激光光源,通过综合光学调制（频率调制、强度调制）技术将基带信号调制到光载波上,最终形成60 GHz毫米波下行信号|同时,相同的光载波在基站被重用,作为上行链路传输光源.系统结合光载波重用技术和综合调制技术特点,合理利用资源,基站结构更为简化.仿真结果表明,该系统可以将速率达2.5 Gbit/s的数据在单模光纤中双向传输20 km,功率代价小于0.5 dB,相对已有的技术方案,该传输系统在传输功率、传输距离、传输性能方面具有明显优势.

Bi-directional Radio over Fiber System Based on Integrated Optical Modulation

A bi-directional radio-over-fiber system using a single light source was demonstrated.A tunable laser was simply configured to produce the constant frequency laser source at central station(CS),and the baseband signal was modulated in optical carrier through integrated optical modulation technology(frequency modulation,intensity modulation),eventually forming a 60 GHz millimeter-wave downlink signal.And,the same optical carrier was reused at base station for uplink connection.The system combined the characteristics of optical carrier reuse technology and integrated optical modulation technology,so as to use resources reasonably and simplify the base station structure.Simulation result shows that the bi-directional 2.5Gbit/s data is successfully transmitted over 20 km single-mode fiber for both upstream and downstream channels with less than 0.5dB power penalty.Relative to the existing technical scheme,the transmission system has advantages in the transmission power,the transmission distance and transmission performance.