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梯状光纤延迟线编解码器是各类延迟线编解码器中最有前途的一种。文章就其设计方法进行了详细的分析和讨论，并着重分析了其中光纤耦合器的最佳耦合因子的设计。将不同情况下的耦合因子对自相关峰值和旁瓣抑制比的影响作了比较。研究表明，要实现正确的解码，各点的最佳耦合因子应使旁瓣抑制比和自相关峰值达到最大。据此设计的编解码器具有良好的性能。
Ladder Fiber Optic Delay Line Codecs are among the most promising of all types of delay line codecs. The article has carried on the detailed analysis and discussion to its design method, and emphatically analyzed the design of the best coupling factor of the optic fiber coupler in it. The influence of the coupling factor on the peak value of autocorrelation and the sidelobe rejection ratio under different conditions was compared. The research shows that in order to achieve correct decoding, the optimal coupling factor of each point should maximize the sidelobe suppression ratio and the peak value of autocorrelation. Codecs designed accordingly have good performance.