Abstract: Three-state optical fiber communication is conceived by using two perpendicular polarization directions of optical to express two different information(such as 2 and 1), and no light state to express the third information(0). It is the combination of polarization-shift and margins-shift essentially. In this theory, a light pulse represents a ternary bit, so the transmission rate of information (bit rates) can be increased by 58.5%. A binary bit is represented, and the system capacity limits of information communication can be increased by 58.5%. This paper accomplishes an experiment about the theory. A three-state optical fiber communication transceiver is built to achieve the goal, and a liquid crystal is used to realize the mutual conversions of three states of optical in the transceiver. Experiments prove the validity of three-state optical fiber communication principle and its feasible ways from theory to application are explored.

Key words: three-state, fiber communication, liquid crystal, transceiver, embedded system

摘要： 针对三态光纤通信的原始设计光路图，依据可控光源的特点和时间冗余技术，提出了2种相应的光路简化方案，得到了较易实现的工程光路图，通过液晶器件实现偏振键控，以嵌入式系统控制液晶器件的显示，制作了一台三态光纤通信收发器，实现了单工、单光纤、单信道的三态光纤通信。试验证明了三态光纤通信原理的正确性和可行性，为三态光纤通信走向实用奠定了实验基础。

关键词: 三态, 光纤通信, 液晶, 收发器, 嵌入式系统

CLC Number: 

• TP334