Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

Rahat Ullah; Bo Liu; Qi Zhang; Muhammad Saad Khan; Ibrar Ahmad; Amjad Ali; Razaullah Khan; Qinghua Tian; Cheng Yan; Xiangjun Xin

doi:10.1117/1.OE.55.9.096106

9 September 2016 Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

Rahat Ullah, Bo Liu, Qi Zhang, Muhammad Saad Khan, Ibrar Ahmad, Amjad Ali, Razaullah Khan, Qinghua Tian, Cheng Yan, Xiangjun Xin

Author Affiliations +

Optical Engineering, Vol. 55, Issue 9, 096106 (September 2016). https://doi.org/10.1117/1.OE.55.9.096106

Abstract

An architecture for flattened and broad spectrum multicarriers is presented by generating 60 comb lines from pulsed laser driven by user-defined bit stream in cascade with three modulators. The proposed scheme is a cost-effective architecture for optical line terminal (OLT) in wavelength division multiplexed passive optical network (WDM-PON) system. The optical frequency comb generator consists of a pulsed laser in cascade with a phase modulator and two Mach–Zehnder modulators driven by an RF source incorporating no phase shifter, filter, or electrical amplifier. Optical frequency comb generation is deployed in the simulation environment at OLT in WDM-PON system supports 1.2-Tbps data rate. With 10-GHz frequency spacing, each frequency tone carries data signal of 20 Gbps-based differential quadrature phase shift keying (DQPSK) in downlink transmission. We adopt DQPSK-based modulation technique in the downlink transmission because it supports 2 bits per symbol, which increases the data rate in WDM-PON system. Furthermore, DQPSK format is tolerant to different types of dispersions and has a high spectral efficiency with less complex configurations. Part of the downlink power is utilized in the uplink transmission; the uplink transmission is based on intensity modulated on-off keying. Minimum power penalties have been observed with excellent eye diagrams and other transmission performances at specified bit error rates.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Rahat Ullah, Bo Liu, Qi Zhang, Muhammad Saad Khan, Ibrar Ahmad, Amjad Ali, Razaullah Khan, Qinghua Tian, Cheng Yan, and Xiangjun Xin "Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps," Optical Engineering 55(9), 096106 (9 September 2016). https://doi.org/10.1117/1.OE.55.9.096106

Published: 9 September 2016

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