更有效的相干检测微波副载波光多路访问星形网络  

A More Cost-Effective Optical Multiaccess SCM Star Network Using CoherentDetection

作　　者：原荣[1] 

机构地区：[1]电子部第34所

出　　处：《光通信技术》1994年第3期210-222,共13页Optical Communication Technology

摘　　要：本文提出一个新的多路复用微波副载波星形网络。该网络总共只使用两个激光器作为每个用户外差探测的信号和本振光源。每个激光器功率通过一个无源星形网络分配给位于不同地方的每个用户。该网络使用微波副载波复用和外差探测，每个用户使用一个Ｍａｃｈ－Ｚｅｈｎｄｅｒ相位调制器用微波副载波调制光信号。使用电调谐选择副载波信道。本文研究表明网络容量可以支持８０个用户。所有用户只分享二个激光器提供的光，可以大大减小网络的复杂性和成本，因此该网络很容易被用户所接受。This paper presents an optical multiaccess SCM star network. The power of each laser is distributed among the users at. different locations through a passive star network and provides respectively the signal and the local oscillator light for the users. The network uses subcarrier multiplexing and coherent detection. Each user uses a Mach-Zehnder phase modulator to modulate the optical signal with a microwave subcarrier. A subcarrier is selected for data transmission using electical tuning. Our study shows that the netxwork size can support up to 80 users. The sharing of only two lasers by all the subscribers can significantly reduce the network complexity and cost,and therefore becomes more acceptable to the subscribers.

关 键 词：微波副载波 光多路访问 星形网络 通信网 

分 类 号：TN913.2[电子电信—通信与信息系统]