A novel structural en/decoder using wavelength selective switch and optical delay line is proposed to reconfigure and achieve high chip rate in two-dimensional wavelength-hopping/time-spreading (2-D WH/TS) optical codedivision multiple access (OCDMA) system. This study expounds the operation principle, presents experimental results from a network tested with user operating at 2.5 Gbit/s, and realizes the experiment of 40 km transmission. Features of group delay and insertion loss about en/decoder are measured and performance of 500 GChip/s rate en/decoder is reached with VPI simulation software. The experimenal results demonstrate that the novel method can recover the waveform, and moreover, the bit error rate of the system can be less than 1.00 × 10_-9.