Realization of high capacity transmission in fiber optic communication systems using Absolute Polar Duty Cycle Division Multiplexing (AP-DCDM) technique.

• Main Authors: Malekmohammadi, Amin, Mahdiraji, Ghafour Amouzad, Abas, Ahmad Fauzi, Abdullah, Mohamad Khazani, Mokhtar, Makhfudzah, A. Rasid, Mohd Fadlee
• Format: Article
• Language: English; English
• Published: Academic Press Inc. 2009
• Online Access: http://psasir.upm.edu.my/id/eprint/16436/1/Realization%20of%20high%20capacity%20transmission%20in%20fiber%20optic%20communication%20systems%20using%20Absolute%20Polar%20Duty%20Cycle%20Division%20Multiplexing.pdf; http://psasir.upm.edu.my/id/eprint/16436/
• Institution: Universiti Putra Malaysia

An electrical multiplexing technique, namely Absolute Polar Duty Cycle Division Multiplexing (AP-DCDM) is reported for high-speed optical fiber communication systems. It is demonstrated that 40 Gb/s (4 × 10 Gb/s) AP-DCDM system shows a clear advantage over conventional 40 Gb/s RZ-OOK with 50% duty cycle in terms of dispersion tolerance and spectral efficiency. At 40 Gb/s its tolerance to chromatic dispersion (CD) is 124 ps/nm and 194 ps/nm for the worst and the best user, respectively. These values are higher than that of 40 Gb/s RZ-OOK, which is around 100 ps/nm. The spectral efficiency, receiver sensitivity and OSNR for different number of channels are discussed. Comparison against other modulation formats namely duobinary, Non-Return-to-Zero (NRZ)-OOK and RZ-Differential Quadrature Phase-Shift Keying (RZ-DQPSK) at 40 Gb/s are made. It is shown that AP-DCDM has the best receiver sensitivity (−32 dBm) and better CD tolerance (±200 ps/nm) than NRZ-OOK and RZ-DQPSK. In reference to duobinary, AP-DCDM has better receiver sensitivity but worse dispersion tolerance.