1.6-b/s/Hz 6.4-Tb/s QPSK-OCDM/WDM (4 OCDM x 40 WDM x 40 Gb/s) transmission experiment using optical hard thresholding

Title : 1.6-b/s/Hz 6.4-Tb/s QPSK-OCDM/WDM (4 OCDM x 40 WDM x 40 Gb/s) transmission experiment using optical hard thresholding
Authors : Hideyuki Sotobayashi, Wataru Chujo, and Ken-ichi Kitayama
Journal : IEEE Photonics Technnology Letters, vol. 14, No.34, pp. 555-557, April, 2002.
Abstract : A record of 1.6 b/s/Hz spectrum effeciency is achieved in optical code-division-multiplexing (OCDM)/wavelength-division-multiplexing (WDM) link by quaternary phase-shift keying optical encoding/decoding along with ultrafast optical time-gating optical and optical hard thresholding in addition to polarization multiplexing. As a result, a transmission of 6.4 Tb/s OCDM/WDM (4 OCDM x 40 WDM x 40Gb/s) using only C-band wavalength region is experimentally demonstrated.
Key words : Optical code-division multiplexing, photonic network, wavelength-division multiplexing, photonic processing