A novel integrated fully passive optical network for free-space optics and visible light communication for last-mile access network based on composite phosphor film

2020 ◽  
Author(s):  
Amjad Ali Amjad ◽  
Mithilesh Kiran Mane ◽  
Riffat Tehseen Amjad ◽  
Chao Zhang ◽  
Zejun Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Free Space ◽  
Optical Network ◽  
Access Network ◽  
Visible Light Communication ◽  
Passive Optical Network ◽  
Free Space Optics ◽  
Space Optics ◽  
Last Mile ◽  
Phosphor Film

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.

An Integrated High-Speed Full Duplex Coherent OFDM-PON and Visible-Light Communication System

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Simarpreet Kaur ◽  
Mahendra Kumar ◽  
Ashu Verma
Keyword(s):  
Visible Light ◽  
Optical Networks ◽  
High Speed ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Dispersion Compensation ◽  
Optical Network ◽  
Visible Light Communication ◽  
Passive Optical Network ◽  
Full Duplex

AbstractWe demonstrated a full duplex hybrid passive optical network and indoor optical wireless system employing coherent optical frequency division multiplexing. To accomplish reliable transmission in passive optical networks integrated visible-light communication (VLC), yellow light-emitting diode and infrared LED is used in downstream and upstream, respectively, for intra building network. In order to support high data rate, pulse-width reduction scheme based on dispersion compensation fiber is incorporated and system successfully covered the distance of 50 km. A data stream at the rate of 30 Gb/s is transmitted for each user out of eight users. VLC-supported users are catered with the bit rate of 1.87 Gb/s over 150 cm and in order to realize a low-cost system, visible and infrared LEDs are used in downlink and uplink, respectively.

Empirical Evaluation of High-speed Cost-effective Ro-FSO System by Incorporating OCDMA-PDM Scheme under the Presence of Fog

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sushank Chaudhary ◽  
Sunita Choudhary ◽  
Xuan Tang ◽  
Xian Wei
Keyword(s):  
Free Space ◽  
High Speed ◽  
Optical Network ◽  
Empirical Evaluation ◽  
Cost Effective ◽  
Free Space Optics ◽  
Space Optics ◽  
Optical Cable ◽  
Application Systems ◽  
Support Cost

AbstractRadio over free space optics (Ro-FSO) innovation saddles the vast limit of optical fiber and the portability from local to remote systems. To enhance the capacity of Ro-FSO systems without compromising the bandwidth, this work incorporates use of hybrid polarization division multiplexing (PDM) with optical code division multiplexing (OCDMA) schemes. Due to low deployment time and support cost, the vast majority of the current optical network application systems adopts free space optics (FSO) as the elective answer for suitably supplanting fiber optical cable. This study has incorporated PDM and OCDMA schemes to design a 50 Gbps Ro-FSO link. Ten channels, each with 5 Gbps of data, are transported via FSO link of 3500 m. In addition, the proposed PDM-OCDMA-Ro-FSO link is evaluated under various atmospheric commotions.

Free space optics: a viable last-mile alternative

2001 ◽  
Author(s):  
Heinz A. Willebrand ◽  
Gerald R. Clark
Keyword(s):  
Free Space ◽  
Free Space Optics ◽  
Space Optics ◽  
Last Mile

scholarly journals Last mile mobile hybrid optical wireless access network routing enhancement

2019 ◽  
Vol 8 (1) ◽  
pp. 188-195
Author(s):  
Adam Wong Yoon Khang ◽  
Shamsul J. Elias ◽  
J. Pusppanathan ◽  
Nadiatulhuda Zulkifli ◽  
N. H. Halim ◽  
...  
Keyword(s):  
Routing Protocol ◽  
Optical Network ◽  
Access Network ◽  
Network Capacity ◽  
Passive Optical Network ◽  
Wireless Access ◽  
Optical Wireless ◽  
Front End ◽  
Last Mile ◽  
Wireless Access Network

This study focuses on mobile ad hoc networks (MANETs) that support Internet routing protocol imposing stringent resource consumption constraints of Quality of service (QoS). The mobile Internet causes the ongoing issue of inefficient use of the MANET resources due to its random nature of wireless environments. In this paper, the new improved architecture of the last mile mobile hybrid optical-wireless access network (adLMMHOWAN) is proposed and designed to tackle the arised issues. The proposed design is based on a unified wireless-wired network solution required the deployment of MANET-based wireless fidelity (WiFi) technology at the wireless front-end and wavelengths division multiplexing passive optical network (WDM PON) at the optical backhaul. The critical performance metrics such as network capacity and energy consumption based on modified AODVUU routing protocol using OMNeT++ software is analyzed with 2 scenarios, namely the number of nodes and mobility speed. This mode of communication results in better QoS network capacity of 47.07% improvement, with 26.85% reduction of lower energy resource consumption for mobile wireless front-end over passive optical network backhaul architecture when compared with the existing work of oRiq scheme that focus on improvement in MANETs.

Hybrid WDM/multibeam free-space optics for multigigabit access network

2014 ◽  
Vol 29 (2) ◽  
pp. 138-145 ◽  
Author(s):  
Samir A. Al-Gailani ◽  
Abu Bakar Mohammad ◽  
Redhwan Q. Shaddad ◽  
Usman U. Sheikh ◽  
Mohamed A. Elmagzoub
Keyword(s):  
Free Space ◽  
Access Network ◽  
Free Space Optics ◽  
Space Optics

An Innovative Approach to Fiber-To-The-Home (FTTH)

2012 ◽  
Vol 487 ◽  
pp. 753-757
Author(s):  
Hsiang Chen Hsu ◽  
Don Liu ◽  
Shu Sen Tieh ◽  
Chun Hsien Kuo
Keyword(s):  
Optical Network ◽  
Access Network ◽  
Passive Optical Network ◽  
Power Ratio ◽  
Optical Components ◽  
Fiber To The Home ◽  
Fiber Coupler ◽  
Active Point ◽  
Last Mile ◽  
Point To Point

In the last mile of optical access network, FTTX such as fiber-to-the-cabinet, curb, building, home and node construction cost per subscriber has always been a concern for the network operators. In order to cost down the fiber and transceiver deployment, passive optical network (PON) are developed to replace active point-to-point (P2P). Also the splitter placement problems are issued that make efforts to reduce fiber and splitters deployment cost. Cost down the optical components in PONs is one of the successful elements for building the business of fiber-to-the-home (FTTH). For an example of insertion loss (IL), a traditional 1x12 splitter module which is cascaded by one piece of 1x2 (67%:33% power ratio, 2.6dB:6.2dB IL) and 10 pieces of 1x2 (50%:50% power ratio, 3.7dB IL) splitters, the IL of module is 2.6+3.7x3=13.7dB. An economical and innovative 1x12 splitter module presented in this paper could be cascaded just by one piece of 1x3 (IL: 5.4 dB) and 3 pieces of 1x4 (IL: 7.2dB), the IL of module will be 5.4+7.2=12.6dB, 1.1dB less than the former. In the case of 1x36, an innovative one is cascaded by 4 pieces of 1x3 and 9 pieces of 1x4 splitters (IL: 18dB) to replace the traditional one which is cascaded by 35 pieces of 1x2 splitters (IL: 19.9dB). Another case of 2x24, an innovative one is cascaded by 1 piece of 2x2, 2 pieces of 1x3 and 6 pieces of 1x4 splitters (IL: 16.3dB) to replace the traditional one which is cascaded by 1 pieces of 2x2 and 22 piece of 1x2 splitters (IL: 17.4dB). Finally, bundle with less IL, the economical multi-output splitter module can be successfully built up by this novel fiber coupler manufacturing apparatus and method.

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