A Scalable Long-Reach Wavelength-Division Multiplexing Access Network Sharing Both Fiber Protection and Broadcasting Services

2014 ◽  
Vol 33 (4) ◽  
pp. 267-278 ◽  
Author(s):  
Chen Feng ◽  
Chaoqin Gan ◽  
Ziyue Gao ◽  
Su Guo ◽  
Wei Li ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Access Network ◽  
Wavelength Division ◽  
Network Sharing

Comparative Analysis of High Speed 20/20 Gbps OTDM-PON, WDM-PON and TWDM-PON for Long-Reach NG-PON2

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Meet Kumari ◽  
Reecha Sharma ◽  
Anu Sheetal
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Speed ◽  
Optical Network ◽  
Access Network ◽  
Cost Effective ◽  
Input Power ◽  
Passive Optical Network ◽  
Wavelength Division ◽  
Transmission Distance ◽  
Wdm Pon

AbstractNowadays, bandwidth demand is enormously increasing, that causes the existing passive optical network (PON) to become the future optical access network. In this paper, next generation passive optical network 2 (NG-PON2) based, optical time division multiplexing passive optical network (OTDM-PON), wavelength division multiplexing passive optical network (WDM-PON) and time & wavelength division multiplexing passive optical network (TWDM-PON) systems with 20 Gbps (8 × 2.5 Gbps) downstream and 20 Gbps (8 × 2.5 Gbps) upstream capacity for eight optical network units has been proposed. The performance has been compared by varying the input power (−6 to 27 dBm) and transmission distance (10–130 km) in terms of Q-factor and optical received power in the presence of fiber noise and non-linearities. It has been observed that TWDM-PON outperforms OTDM-PON and WDM-PON for high input power and data rate (20/20 Gbps). Also, TWDM-PON shows its superiority for long-reach transmission up to 130 km, which is a cost-effective solution for future NG-PON2 applications.

scholarly journals A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms

2019 ◽  
Vol 9 (19) ◽  
pp. 4059 ◽  
Author(s):  
Charoula Mitsolidou ◽  
Christos Vagionas ◽  
Agapi Mesodiakaki ◽  
Pavlos Maniotis ◽  
George Kalfas ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Integrated Circuit ◽  
Orthogonal Frequency Division Multiplexing ◽  
Access Network ◽  
Intermediate Frequency ◽  
Error Vector Magnitude ◽  
Photonic Integrated Circuit ◽  
Wavelength Division ◽  
High Data ◽  
Radio Access

Analog fronthauling is currently promoted as a bandwidth and energy-efficient solution that can meet the requirements of the Fifth Generation (5G) vision for low latency, high data rates and energy efficiency. In this paper, we propose an analog optical fronthaul 5G architecture, fully aligned with the emerging Centralized-Radio Access Network (C-RAN) concept. The proposed architecture exploits the wavelength division multiplexing (WDM) technique and multicarrier intermediate-frequency-over-fiber (IFoF) signal generation per wavelength in order to satisfy the demanding needs of hotspot areas. Particularly, the fronthaul link employs photonic integrated circuit (PIC)-based WDM optical transmitters (Txs) at the baseband unit (BBU), while novel reconfigurable optical add-drop multiplexers (ROADMs) cascaded in an optical bus are used at the remote radio head (RRH) site, to facilitate reconfigurable wavelength switching functionalities up to 4 wavelengths. An aggregate capacity of 96 Gb/s has been reported by exploiting two WDM links carrying multi-IF band orthogonal frequency division multiplexing (OFDM) signals at a baud rate of 0.5 Gbd with sub-carrier (SC) modulation of 64-QAM. All signals exhibited error vector magnitude (EVM) values within the acceptable 3rd Generation Partnership Project (3GPP) limits of 8%. The longest reach to place the BBU away from the hotspot was also investigated, revealing acceptable EVM performance for fiber lengths up to 4.8 km.

Review on Wavelength Division Multiplexing Free Space Optics

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
S. Magidi ◽  
A. Jabeena
Keyword(s):  
Wavelength Division Multiplexing ◽  
Free Space ◽  
Access Network ◽  
Research Direction ◽  
Hybrid Network ◽  
Free Space Optics ◽  
Wavelength Division ◽  
Space Optics ◽  
Current State ◽  
Data Rates

AbstractWavelength division multiplexing-based free space optics (WDM FSO) has emerged as a potential communication network candidate for last-mile access among other applications. FSO has received much attention in the last few years as a complement as well as an alternative to radio frequency-based communication due to spectrum crisis among other reasons. On the other hand, WDM has been considered as one of the next-generation optical access network candidates for bandwidth efficiency and increased data rates. A hybrid network of these two technologies thus has emerged as another research direction. In this article, we present the background, progress and the current state of WDM FSO.

Evolution to broadband via optical ISDN

1989 ◽  
Vol 329 (1603) ◽  
pp. 57-60
Keyword(s):  
Wavelength Division Multiplexing ◽  
Access Network ◽  
Single Mode ◽  
Cost Effective ◽  
Distributed Networks ◽  
High Definition ◽  
Wavelength Division ◽  
High Definition Television ◽  
Local Access ◽  
Recent Developments

A comprehensive broadband information network has been the goal of many Telecom operators worldwide. It is likely that such target networks will be single mode and will use time- and wavelength-division multiplexing and eventually coherent technologies to carry all services (including high-definition television). At issue is whether fibring of the local-access network can proceed by direct installation of such comprehensive target systems in the 1990s, or whether fibre solutions could first become cost-effective for current narrowband services and then gracefully evolve to broadband services. Regarding the technologies, there is more familiarity with star networks involving one or two fibres to each customer. In this paper, recent developments in the use of passive distributed networks are described, and optoelectronic issues affecting the adoption of star and distributed technologies are considered against the means of achieving future broadband infrastructures.

WDM techniques in broadband optical networks

1989 ◽  
Vol 329 (1603) ◽  
pp. 105-118 ◽  
Keyword(s):  
Optical Networks ◽  
Optical Fibre ◽  
Wavelength Division Multiplexing ◽  
Network Architecture ◽  
Access Network ◽  
Wavelength Division ◽  
Fibre Technology ◽  
Low Bit Rate ◽  
Access Structures ◽  
Local Access

The penetration of optical-fibre technology into the local-access network may well occur by the economic provision of well-established services, such as basic telephony, over a shared-access optical architecture. The provision of new broadband services needs to be done without disruption to these basic (telephony) services. Wavelength-division multiplexing techniques allow the possibility of broadband upgrade on a shared-access network architecture without disturbing existing services. The nature of shared-access structures, although providing opportunities for the early economic provision of basic low-bit-rate services, gives rise to major implications for the requirements of the WDM technology used for upgrading to broadband operation. In this paper example network structures are examined in terms of possible upgrade strategies and the associated technological implications.

ULTRA-COMPACT SPECTRAL SLICER DEVICES BASED ON MICRORING RESONATORS

2005 ◽  
Vol 14 (02) ◽  
pp. 273-279
Author(s):  
FREDDY SUSANTO TAN ◽  
HENRY KELDERMAN ◽  
ALFRED DRIESSEN
Keyword(s):  
Wavelength Division Multiplexing ◽  
Low Cost ◽  
Laser Diodes ◽  
Access Network ◽  
Microring Resonators ◽  
Wavelength Division ◽  
Rejection Ratio ◽  
Broadband Light Source ◽  
The Individual ◽  
Additional Channel

In Wavelength Division Multiplexing (WDM), access network spectral slicer devices in connection with a broadband light source are attracting low-cost alternatives for the laser diodes that are required for transmission in the desired wavelength channels. The proposed ultra-compact spectral slicer devices consist of microring resonators with slightly different radius and consequently slightly different resonant wavelength. Single and cascaded multiple microring devices have been fabricated and characterized to demonstrate the desired functionality. Cascaded devices show better performance in term of lower crosstalk, higher rejection ratio and faster roll-off. Moreover, they open the possibility to improve the spectral efficiency of the individual channels without introducing additional channel crosstalk.

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