3GAO Ze hua,\ QIAN Zong jue,\ XU Da xiong Foundation item: This work is supported by the National Foundation Natural Science of China under project No.69990540(3). Biography:\ GAO Ze hua(1971-), male, from Shandong Province, Ph.D., Beijing Universit.An Encoder/Decoder Scheme of OCDMA Based on Waveguide[J].The Journal of China Universities of Posts and Telecommunications,2001,8(1):31-36.