A Novel Total-Dispersion-Compensating En/Decoder for Time-Spread/Wavelength-Hopping OCDM System

A novel dispersion-compensating fiber-Bragg-grating (FBG)-based en/decoder is proposed to compensate both the out-band and in-band dispersion in a time-spread/wavelength-hopping (TS/WH) optical code-division multiplexing (OCDM) system. The experimental realization of such en/decoders only needs a uniform-pitch phase mask and sub-micrometer precision moving stage. Such an en/decoder pair with the ability of compensating the dispersion of transmission in 20km single mode fiber (SMF) is simulated and experimentally fabricated. Both the simulation and experimental results show that the decoded pulse can be recovered without any distortion owing to the elimination of dispersion.