Future University In Egypt (FUE)

Staff Research

Paper Title :
Author : MOHAMED MOUSA SAYED EMAM AHMED
CoAuthors : Mahmoud H. Ahmed, Mohamed Abouelatta, and Abdelrahman E. Afifi
Source : SPIE Optical Engineering + Applications, SPIE conference
Date of Publication : 09/2016
Abstract : An optical scheme to improve the quality of an RF signal is proposed. The 6 dB linewidth is reduced to sub hertz and the low frequency noise below 1 KHz is reduced about 10 dB. The scheme utilizes a Brillouin-semiconductor optical amplifier (SOA) ring laser fitted with an RF intensity modulator and an APD detector. The experimental results show cavity modes with FSR of 30.57 KHz due to Brillouin fiber length of 6.6 km and 6 dB bandwidth of 780 mHz typical of Brillouin lasers. The gain of the SOA balances out most of the losses in the ring mainly that due to the RF modulator. The modulated optical signal beats at the APD. The optical loop acts as a cavity filter to the RF signal. A jitter in the cavity resonances due to temperature variations is completely eliminated from the output beat signal. There is a 10 dB increase in the phase noise at the FSR frequency and its harmonics. The setup is tested with signals generated by different sources and to frequencies up to 10 GHz, the limit of the APD. Sources with RF linewidth less than the optical FSR produces one output mode with sub-hertz line width. For larger line width signals more than one RF frequency is produced, separated by the FSR, each showing the Brillouin linewidth.
Download PDF
BACK
  • Research Centers

    With the growing emphasis on collaborative and interdisciplinary science, Research Centers have become indispensable to highly ranked universities. They gain their importance from the outstanding role they play in enhancing the academic activities, in general, and post graduate reputation and scientific ranking in particular. Realizing this fact, Future University in Egypt (FUE) have decided and allocated sufficient funds and infrastructure to establish FUE Research Center (FUERC) having the following vision, mission, and goals

    read more
  • Continuing Education

    Future University in Egypt’s Department of Continuing Education (DCE) is dedicated to bridging the gap between the capabilities

    read more
  • FUE Pharmaceutical Factory

    The Future Factory for Industrial Training’s (FFIT) aim is to be recognized for its unique training facility as well as its advanced techniques. As a result, we established a training pharmaceutical plant, that provides an actual simulation of an industrial atmosphere with the processes and procedures that take place in the manufacturing world.

    read more
  • FUE Dental Hospital

    FUE has maintained a highly reputable dental faculty over the years, therefore the development of the Dental Hospital is a step towards the FUE goal of providing the best dental academic programs

    read more
Community service unit at Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, launches Q&A about Covid-19.

Community service unit at Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, launches Q&A about Covid-19.

COVID-19 Awareness
FUEscientificJournals

VISIT FUE

Take a step to<br>Future<br>For a better future

Address

End of 90th St., Fifth Settlement,
New Cairo, Egypt

Hotline

Inside Egypt: 16383 (16FUE)

Outside Egypt: +20216383, +2026186100

Copyright © 2023 [Future University in Egypt]. All rights reserved.