There are three key modules in coherent optical code division multiple access (OCDMA) system: ultra-short optical pulse source, en/decoder and receiver. Equivalent phase shift super structured fiber Bragg grating (EPS-SSFBG) OCDMA en/decoders were experimentally demonstrated. 2.5 Gbit/s OCDMA experiment is shown to achieve 60 km error free transmission using gain switch laser diode, 63-chip EPS-SSFBG phase en/decoder and threshold adjustable receiver. The receiver sensitivity is -22.5 dBm at 10-9 bit error rate (BER). The experimental results prove that EPS-SSFBG en/decoder could be used in practical OCDMA system due to its high performance and realizability. It is a very important method to improve system performance by using optical and electrical processing to restrict noise and side lobe.