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本文提出了全响应数字光纤通信接收机最佳传递函数的逼近和实现方法;给出了在小色散和大色散光纤通信系统中近似实现光接收机最佳传递函数的电路型式;构造了一种能使光接收机对不同带宽的光纤线路近似实现最佳传递函数的可变均衡电路。文中给出了用本方法设计的1.3μm、34Mb/s光接收机的设计实例和实测结果。该接收机已在中继间隔为24.6km的实验性光纤通信系统和为武汉市电信部门建设的13.6km实用化34Mb/s光缆通信试验段上投入使用,效果良好。
In this paper, the method of approximation and realization of the optimal transfer function of full-response digital optical fiber communication receiver is proposed. The circuit type which approximates the optimal transfer function of optical receiver in small dispersion and large dispersion optical fiber communication system is given. The optical receiver can make the optical fiber circuit with different bandwidth approximately achieve the best transfer function of the variable equalization circuit. The design examples and measured results of the 1.3μm, 34Mb / s optical receiver designed by this method are given in this paper. The receiver has been put into use in the experimental optical fiber communication system with a relay interval of 24.6km and the 13.6km practical 34Mb / s optical fiber communication test section for Wuhan telecom department, and the effect is good.