Design of 3-D Wavelength/Time/Space Codes for Asynchronous Fiber-Optic CDMA Systems

A new family of three-dimensional (3-D) wavelength/time/space codes for asynchronous optical code-division multiple access (OCDMA) systems with off-peak auto-correlation, ¿
a
= 0, and peak cross-correlation, ¿
c
= 1, is reported. With
W
wavelengths and
T
time-slots, (
W

²

T
+
W
) codes are generated. Antipodal signaling/differential detection is employed in the system. The performance is compared to the recently reported two-dimensional (2-D)/3-D codes. Arrayed waveguide grating-based reconfigurable 2-D implementation for encoder/decoder is presented. Suitability of our 3-D codes for secure OCDMA networks is discussed.