摘要
线性光耦合器由线性光接收、光发射器件和光纤组成,使用两根约50厘米长的线性光耦合器、特殊设计的电话接口实现音频信号的全双工通讯,两接口隔离电压在数万伏以上,满足了某些应用场合要求内部电话设备与外部电话网络保持电气高压隔离的需求。接口电路使用相位抵偿原理较好地解决了同一回路同时传输双向音频信号可能导致的正反馈问题。
The linear optical coupler is made up of linear optical receiver, optical sender and fibers. Full-duplex communication by audio signals can be achieved with a pair of about 50cm-long linear optical couplers and specially designed teleinterface. The insulated voltage is above several thousand volts, which can meet the demand of highvoltage insulating the inside telephone and outside tele-networks in some application. Using the theory of phase compensation, interface circuit can settle the possible positive- feedback problem, sending dual audio-frequency signals in the same circuit.
出处
《闽江学院学报》
2005年第2期53-56,共4页
Journal of Minjiang University
关键词
光纤
电话
隔离
线性
光耦合器
通讯
optical fiber
telephone
insulation
linearity
optical coupler
telecommunication
