scholarly journals Optical Multi-Wavelength Source for Single Feeder Fiber Using Suppressed Carrier in High Capacity LR-WDM-PON

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 70674-70684 ◽  
Author(s):  
Sibghat Ullah ◽  
Rahat Ullah ◽  
Adil Khan ◽  
Hafiz Ahmad Khalid ◽  
Qi Zhang ◽  
...  
Keyword(s):  
High Capacity ◽  
Multi Wavelength ◽  
Wdm Pon

scholarly journals Long Reach and High Capacity Hybrid Passive Optical Network

2018 ◽  
Vol 11 (3) ◽  
pp. 891
Author(s):  
Subhashini N ◽  
Brintha Therese A
Keyword(s):  
Dispersion Compensation ◽  
Optical Network ◽  
Access Network ◽  
High Capacity ◽  
Passive Optical Network ◽  
Modulation Formats ◽  
High Data ◽  
Modulation Format ◽  
Compensation Mechanisms ◽  
Wdm Pon

<p>A number of applications are growing day by day and so the traffic. The need for bandwidth is also increasing at a rapid rate. The bandwidth and speed with which data can be transferred was very less when compared to core networks. The access network which was once a bottleneck is no longer so because of use of optic fiber (FTTH networks). A number of variants of Passive Optical Network (PON) have been proposed like the WDM PON and the Hybrid PON. Hybrid PON is a combination of TDM PON and WDM PON and is advantageous over WDMPON. This paper focuses on high capacity networks that can provide high data rate and long reach in the access part of the network. NRZ modulation format is normally used for transmission.  We consider the advantages provided by the advanced modulation formats like DPSK. This modulation format is used to here and its benefits are evaluated in Hybrid PON network to increase the capacity and the reach of the network. Parameters like the BER and the Q factors are analysed using Optisystem Software. Distortion and the phenomena of dispersion can limit the performance of such a system. Hence Dispersion compensation mechanisms like the Dispersion Compensation Fiber (DCF) are used in the system to transmit data over large distance.</p>

scholarly journals Quantum dot multi-wavelength lasers for Tbit/s coherent communications and 5G wireless networks -INVITED

2020 ◽  
Vol 238 ◽  
pp. 01003
Author(s):  
Z.G. Lu ◽  
J.R. Liu ◽  
Y.X. Mao ◽  
K. Zeb ◽  
G.C. Liu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
High Speed ◽  
High Capacity ◽  
Modulation Formats ◽  
Qam Modulation ◽  
Optical Modes ◽  
Multi Wavelength ◽  
Dfb Laser ◽  
Technical Specifications ◽  
Transmission Link

We will present the design, growth, fabrication, electronic control and packaging of the InAs/InP quantum dot (QD) multi-wavelength lasers (MWLs) developed by AEP of NRC in Canada. Their key technical specifications include L-I-V curves, optical and RF beating spectra, relative intensity noise (RIN), and optical phase noise of each individual wavelength channel, as well as timing jitter are investigated. Data bandwidth transmission capacity of 5.376 Tbit/s and 10.3 Tbit/s respectively in the PAM-4 and 16-QAM modulation formats are demonstrated by only using a single QD MWL chip. We have also developed a novel monolithic InAs/InP QD dual-wavelength (DW) DFB laser as a compact optical beat source to generate millimeter-wave (MMW) signals. Because of using a common cavity, highly coherent and correlated optical modes with optical linewidth as low as 15.83 kHz, spectrally pure MMW signals around 46.8 GHz with a linewidth down to 26.1 kHz were experimentally demonstrated. By using this QD DW-DFB laser, a 1Gbaud (2Gbps) MMW over-fiber transmission link is demonstrated with PAM-4 signals. The results show that the demonstrated device is suitable for high speed high capacity MMW fiber-wireless integrated fronthaul of 5G networks.

A Comparative Study of Performances Between the WDM PON System and the CWDM PON System in an Optical Access Network

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Cheikh Kherici ◽  
Malika Kandouci
Keyword(s):  
Comparative Study ◽  
Optical Fibers ◽  
Optical Network ◽  
Access Network ◽  
High Capacity ◽  
Single Mode ◽  
Passive Optical Network ◽  
Power Budget ◽  
Water Vapor Absorption ◽  
Wdm Pon

AbstractThe growth of optical technology is currently being studied extensively to meet the significant demand for bandwidth. The passive optical network (PON) solves the problem of bandwidth as it extends the optical network to individuals and businesses [Sifta R, Munster P, Krajsa O, Filka M, “Simulation of bidirectional traffic in WDM-PON networks", Brno University of Technology, ISSN 0033–2097, R. 90 NR 1/2014.]. In this paper, a comparative study is made between the WDM PON system and the CWDM PON system using two different architectures, one for the WDM PON and the other for the CWDM PON, to illustrate the appropriate technique for the PON network by increasing the Q factor and the OSNR ratio while minimizing the bit error rate (BER < 10–9). Both systems are simulated at 10 Gbps for four users of bidirectional SMF (Single Mode Fiber) fiber lengths and different powers. In order to determine the transmission performance for both systems, the link was designed for fiber lengths of 20, 30, 40, 50 and 60 km as well as for powers from −10 dBm up to 10 dBm for four users. The use of the EDFA amplifier in the WDM PON system is required in this document to minimize degradation caused by attenuation [Parkirti RDK, Singh R. Cost-efficient Colorless WDM-PON Based on RSOA for High Capacity. Int J Adv Res Comput Eng Technol (IJARCET). 2016;5]. On the contrary, in the CWDM PON system, the amplification is not essential because the wavelengths used in this system are not affected by the water peak which causes a strong attenuation of the wavelengths in the 1370–1410 nm range on optical fibers [Nazir M, Arshad F, Asif R. Design and evaluation of power budget for a bidirectional CWDM-Passive Optical Network. In: International Conference on Communication, Computing and Digital Systems (C-CODE), Islamabad, Pakistan, 04 May 2017.]. The peak of water vapor absorption is close to 1383 nm.

scholarly journals Hybrid OFDM RoF-Based WDM-PON/MMW Backhaul Architecture For Heterogeneous Wireless Networks

2018 ◽  
Author(s):  
Trang Thi Thu Ngo ◽  
Thu Anh Pham ◽  
Nhan Duc Nguyen ◽  
Ngoc The Dang
Keyword(s):  
Wireless Networks ◽  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Orthogonal Frequency Division Multiplexing ◽  
Heterogeneous Wireless Networks ◽  
High Capacity ◽  
Base Stations ◽  
Wavelength Division ◽  
Noise Amplifier ◽  
Wdm Pon

In this paper, a hybrid backhaul architecture, which is based on wavelength-division multiplexing passive optical networks (WDM-PON) and millimeter-wave (MMW) communications, is proposed to deliver orthogonal frequency-division multiplexing (OFDM) signals in heterogeneous wireless networks. MMW radio-over-fiber (RoF) technique, which combines the advantages of the both optical fiber and wireless communications, is used to simplify the base stations and provide flexibility long reach and high capacity connections. The feasibility of the proposed hybrid backhaul architecture is investigated via the bit-error rate (BER) performance of a downlink under the impacts of fiber nonlinear, wireless fading and noise components including clipping noise, amplifier noise and photodetector noise. The numerical results obtained from this study help to determine the optimum system parameters such as the optical launched power, modulation index, and amplifier gain so as to minimize the link’s BER.

Graphene-based multi-wavelength source for WDM-PON

2020 ◽  
Author(s):  
Jhon A. Lopera ◽  
Karen Arroyave ◽  
Ana M. Cárdenas ◽  
Jhon J. Granada Torres ◽  
Juan D. Zapata
Keyword(s):  
Multi Wavelength ◽  
Wdm Pon
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