SYSTEM PERFORMANCES OF OPTICAL SPACE CODE-DIVISION MULTIPLE-ACCESS-BASED FIBEROPTIC 2-DIMENSIONAL PARALLEL DATA LINK

Optical space code-division multiple access is a scheme to multiplex a nd link data between two-dimensional processors such as smart pixels a nd spatial light modulators or arrays of optical sources like vertical -cavity surface-emitting lasers. We examine the multiplexing character istics of optical space code-division multiple access by using optical orthogonal signature patterns. The probability density function of in terference noise in interfering optical orthogonal signature patterns is calculated. The bit-error rate is derived from the result and plott ed as a function of receiver threshold, code length, code weight, and number of users. Furthermore, we propose a prethresholding method to s uppress the interference noise, and we experimentally verify that the method works effectively in improving system performance. (C) 1998 Opt ical Society of America.