Stabilization of self-coherent OFDM with injection locked laser

Susmita Adhikari, Stylianos Sygletos, Andrew D. Ellis, Beril Inan, Sander L. Jansen, Werner Rosenkranz

Research output: Chapter in Book/Published conference outputConference publication


With the rebirth of coherent detection, various algorithms have come forth to alleviate phase noise, one of the main impairments for coherent receivers. These algorithms provide stable compensation, however they limit the DSP. With this key issue in mind, Fabry Perot filter based self coherent optical OFDM was analyzed which does not require phase noise compensation reducing the complexity in DSP at low OSNR. However, the performance of such a receiver is limited due to ASE noise at the carrier wavelength, especially since an optical amplifier is typically employed with the filter to ensure sufficient carrier power. Subsequently, the use of an injection-locked laser (ILL) to retrieve the frequency and phase information from the extracted carrier without the use of an amplifier was recently proposed. In ILL based system, an optical carrier is sent along with the OFDM signal in the transmitter. At the receiver, the carrier is extracted from the OFDM signal using a Fabry-Perot tunable filter and an ILL is used to significantly amplify the carrier and reduce intensity and phase noise. In contrast to CO-OFDM, such a system supports low-cost broad linewidth lasers and benefits with lower complexity in the DSP as no carrier frequency estimation and correction along with phase noise compensation is required.
Original languageEnglish
Title of host publication14th International Conference on Transparent Optical Networks
Number of pages4
ISBN (Electronic)978-1-4673-2227-0
ISBN (Print)978-1-4673-2228-7, 978-1-4673-2229-4
Publication statusPublished - Jul 2012
Event14th International Conference on Transparent Optical Networks - University of Warwick, Coventry, United Kingdom
Duration: 2 Jul 20125 Jul 2012

Publication series

NameIEEE conference publications
ISSN (Print)2161-2056


Conference14th International Conference on Transparent Optical Networks
Abbreviated titleICTON 2012
Country/TerritoryUnited Kingdom

Bibliographical note

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