梯状光纤延迟线编解码器的设计与实现

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。

Design and realization of trapezoid fiber optic delay line encoder/decoder

Trapezoid fiber optic delay line encoder/decoder is the most prospective encoder/decoder among various fiber optic delay line counterparts.Its design method is discussed and analyzed in detail with the emphasis on the design of the optimum coupling factor for the fiber coupler.Comparison is made on the effect of the coupling factor on the autocorrelation peak and the sidelobe compression ratio under different conditions.It is shown that to get a correct decoding,the optimum coupling factor at each point should maximize the autocorrelation peak and the sidelobe compression ratio.The experimental results indicate that the encoder/decoder exhibits excellent performances in terms of this method.