首先,利用500m长色散平坦高非线性光纤(dispersion flattened highly nonlinear fiber,DF-HLNF)作为非线性介质,通过四波混频效应实现了1541.8~1559.4 nm的全光波长变换,变换带宽为17.6 nm。然后,将原始信号和波长变换信号在3.88 km中的色散补偿光纤(dispersion compensating fiber,DCF)中传输,实现了超过6 ns的慢光延时量。实验结果与理论值非常一致,对未来全光通信系统中的光延时线和光缓存器具有重要的参考价值。 First of all, by using the 500m dispersion flattened highly nonlinear fiber (DF-HLNF) as the nonlinear medium, the all-optical wavelength conversion of 1541.8 ~ 1559.4 nm is realized by the four-wave mixing effect with the conversion bandwidth of 17.6 nm . Then, the original signal and the wavelength-converted signal were transmitted in a dispersion compensating fiber (DCF) at 3.88 km, achieving a slow light delay of more than 6 ns. The experimental results are in good agreement with the theoretical ones and have important reference value for the optical delay line and optical buffer in the future all-optical communication system.