In optical code division multiple access system, the length of optical orthogonal code (OOC) should be in creased in order to improve system capacity and thus to compress optical pulses.

• 摘要在光码分多址系统中，提高系统容量需要增大光正交码的长度，从而压缩光脉冲，而超短光脉冲的产生不易实现。