Stabilization of self-coherent OFDM with injection locked laser

Adhikari, Susmita; Sygletos, Stylianos; Ellis, Andrew D.; Inan, Beril; Jansen, Sander L. and Rosenkranz, Werner (2012). Stabilization of self-coherent OFDM with injection locked laser. IN: 14th International Conference on Transparent Optical Networks (ICTON), 2012. IEEE conference publications . IEEE.

Abstract

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.

Additional Information: © 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Event Title: 14th international conference on transparent optical networks
Event Type: Other
Event Location: Coventry
Event Dates: 2012-07-02 - 2012-07-05
Uncontrolled Keywords: Computer Networks and Communications, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials
Published Date: 2012-07

Download

[img]

Version: Submitted Version

Export / Share Citation


Statistics

Additional statistics for this record