Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6878924 | AEU - International Journal of Electronics and Communications | 2018 | 10 Pages |
Abstract
The generation of optical frequency comb (OFC) with novel controlled delay circuit is presented in this study. The proposed OFC is based on a single laser source which is cascadingly connected with three modulators; all the modulators are tailored by RF signal while incorporating no phase shifter or electrical/optical amplifier. The proposed OFC is used as a source at optical line terminal (OLT) of WDM-PON setup, which serves multiple users with a single laser source making OLT side very cost effective. 41 comb lines with over 40â¯dB tone to noise ratio and high side mode suppression ratio, least amplitude difference of under 0.3â¯dB, with cost effective setup is an attractive source for WDM-PON system. The frequency spacing is 32â¯GHz between OFCG lines which provides enough bandwidth for data transmission, the overall bandwidth provided by this scheme is 1.2 THz. Using DPSK modulation technique across each frequency of OFCG, the controlled delay circuit increases the capacity by factor two, whereas by deploying DQPSK modulation technique, it quadrupled the overall capacity in downlink transmission. Thus, the system offers four times increased capacity â¼1.6 Tbps by deploying state of the art technique for modulation and generating OFC with controlled delay. The average power penalty in the downlink and uplink transmission is 2.5 dBm and 3.13 dBm.
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
Rahat Ullah, Liu Bo, Mao Yaya, Feng Tian, Amjad Ali, Ibrar Ahmad, Muhammad Saad Khan, Xin Xiangjun,