Design And Development Of Simplex-To-Full Duplex Converter (Sfdc)

Abas @ Ismail, Ahmad Fauzi (2002) Design And Development Of Simplex-To-Full Duplex Converter (Sfdc). Masters thesis, Universiti Pertanian Malaysia.

[img] PDF
2097Kb

Abstract

Existing fiber optic network employ simplex transmission scheme where two fibers are needed, each to transmit and received signals between connecting points. The increasing demand has seen fiber, particularly in the metro area, are used up in no time. The conventional solution is to install new fibers to support new customers. However fiber installation are always expensive and fussy. Thus, a new approach is desirable in solving the problem. In this thesis, new technique is proposed to double the link bandwidth by fully utilizing the two fiber cores. The technique is based on the basic ligthwave principle that two photons do not know each other. Therefore the optical signals, transmitted and received ones can be made to propagate in the opposite direction in the same fiber, as long as they can be split and isolated at the receiver side. The techniques proposed here in achieving the goal is simple but quite powerful. The components used in developing the device are all passive products. Each of them was characterized prior to developing them according to the design. Then the whole device was tested further both on its own, and in network environment.From the tests conducted, it is important to reduce the reflection from transmitters to adjacent receivers, which is due to SFDC directivity. From the study it is found that the minimum isolation needed between actual and reflected signal to achieve good transmission quality is around 13 dB. Testing on SDH network was successfully conducted on over 50 km fiber link with zero errors. The test was conducted in both laboratory and testbed environment, with cooperation from Telekom Malaysia. Testing on WDM system was conducted in laboratory environment only. The test shows that no error is introduced. Finally it is concluded that SFDC is reliable to be used as a device to realize full duplex transmission, as its realization would result in huge increase in fiber bandwidth utilization with minimum installation and maintainance complexity and cost.

Item Type:Thesis (Masters)
Chairman Supervisor:Associate Professor Mohamad Khazani bin Abdullah, PhD
Call Number:FK 2002 61
Faculty or Institute:Faculty of Engineering
ID Code:12095
Deposited By: Mohd Nezeri Mohamad
Deposited On:18 Jul 2011 01:26
Last Modified:18 Jul 2011 01:26

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 18 Jul 2011 01:26.

View statistics for "Design And Development Of Simplex-To-Full Duplex Converter (Sfdc) "


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.