Analysis of return-to-zero-on-off-keying over absolute polar duty cycle division multiplexing in dispersive transmission medium

• Main Authors: Malekmohammadi, Amin, Abdullah, Mohamad Khazani, Mahdiraji, Ghafour Amouzad, Abas, Ahmad Fauzi, Mokhtar, Makhfudzah, A. Rasid, Mohd Fadlee, Mohd Basir, Safuraa
• Format: Article
• Language: English
• Published: The Institution of Engineering and Technology 2009
• Online Access: http://psasir.upm.edu.my/id/eprint/13086/1/Analysis%20of%20return-to-zero-on-off-keying%20over%20absolute%20polar%20duty%20cycle%20division%20multiplexing%20in%20dispersive%20transmission%20medium.pdf; http://psasir.upm.edu.my/id/eprint/13086/; http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5172819
• Institution: Universiti Putra Malaysia

We propose and investigate a technique to reduce the spectral width as well as increase the tolerance to chromatic dispersion (CD) using improved return-to-zero (RZ) on-off-keying (OOK) over absolute polar duty cycle division multiplexing (AP-DCDM) technique. The proposed channel multiplexing and demultiplexing are performed electrically using only one modulator for n number of users, which is very economical. It is demonstrated that the spectral width occupied by 30 Gb/s RZ-OOK without AP-DCDM measured at -20 dB from the peak power is around 105 GHz whereas, this value can be reduced to around 64 GHz for 30 Gb/s RZ-OOK over AP-DCDM. This amount of saving in the spectral width is a significant achievement, which leads to better tolerance to CD. Its tolerance to CD is in the range of plusmn109 and plusmn155 ps/nm, for the worst and the best users, respectively. These values are higher than that of 30 Gb/s conventional RZ-OOK, which is around plusmn86.5 ps/nm. At 120 Gb/s RZ-OOK over AP-DCDM (the worst user) has pre-amplified receiver sensitivity and optical signal to noise ratio (OSNR) of -22.5 dBm and 28.57 dB, respectively.