Frequency-Selectable and Multi-Channel Wavelength Division Multiplexing Radio-over-Fiber System

2016 ◽  
Vol 43 (5) ◽  
pp. 0505007
Author(s):  
韩一石 Han Yishi ◽  
罗志霄 Luo Zhixiao ◽  
覃新宇 Qin Xinyu ◽  
郑振宇 Zheng Zhenyu
Keyword(s):  
Wavelength Division Multiplexing ◽  
Radio Over Fiber ◽  
Fiber System ◽  
Wavelength Division ◽  
Channel Wavelength ◽  
Radio Over Fiber System

scholarly journals Improvements on the performance of subcarrier multiplexing/wavelength division multiplexing based radio over fiber system

2021 ◽  
Vol 11 (2) ◽  
pp. 1439
Author(s):  
Duc-Tan Tran ◽  
Ninh Trung Bui
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Phase Shifter ◽  
Fiber Amplifier ◽  
Radio Over Fiber ◽  
Fiber System ◽  
Channel Spacing ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Subcarrier Multiplexing

Radio over fiber (RoF) techniques are good candidates to create the backbone of the next generation of wireless networks. Many parameters affect RoF communications such as amplified spontaneous emission noise (ASE), four-wave mixing nonlinearity (FWM), the modulation, channel spacing, switching voltage, and phase shifter. In this paper, we propose an improved model of RoF communication systems using subcarrier multiplexing/wavelength division multiplexing (SCM/WDM) technique with unequal channel spacing and 1-km Erbium-doped fiber amplifier (EDFA). Simulation results confirmed that we could obtain the lowest bit error rate and noises when the EDFA is placed at 1 km from the transmitter by using optical single-sideband (OSSB) modulation at frequencies 193.1 THz, 193.2 THz, 193.35 THz, and 193.6 THz.

scholarly journals Methodology for evaluating linear and non-linear effects in a radio over fiber system

Respuestas ◽  
2018 ◽  
Vol 23 (2) ◽  
pp. 75-88
Author(s):  
Karla Cecilia Puerto López ◽  
Rudy Paolo Báez Parada ◽  
Ángel David Torres Palencia ◽  
Dinael Guevara Ibarra Guevara Ibarra
Keyword(s):  
Optical Fiber ◽  
Wavelength Division Multiplexing ◽  
Input Power ◽  
Radio Over Fiber ◽  
Optical Channel ◽  
Fiber System ◽  
International Telecommunication Union ◽  
Non Linear ◽  
Linear Effects ◽  
Radio Over Fiber System

This article shows the methodology used to evaluate the linear and non-linear effects present in a radio over fiber system (RoF) by employing the multiplexing technique used for dense wave division, the Dense Wavelength Division Multiplexing (DWDM) technique. It is completed with a dissemination of 50 GHz, in accordance to the standards of the International Telecommunication Union (ITU), through a channel speed of 10 Gbps, at an input power in the optical channel of 30mW, for optical fiber stretches of 40km, 60km and 80km. It presents the modeling of the RoF system graphically through a block diagram by means Matlab, a computational tool, whereby each of the stages of the RoF system are implemented using the libraries offered by the ‘simulink’  toolbox of Matlab. As a result, it is obtained that the methodology proposed for the evaluation of the RoF system using the DWDM technique allows for the analysis of linear and non-linear effects; where it is observed that the effects that degrade the signal are proportional to the established distances of the optical fiber and that the optical input power used is optimal for the optical fiber to behave as a non-linear medium.

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