Optical Regeneration Based on Optical Parametric Processes

Valerija Kamchevska

Technical University of Berlin

Abstract:

The topic that will be presented refers to phase-sensitive fiber optic parametric amplifiers (PS-FOPAs) and their applications for optical regeneration. A brief overview of the operation principle of PS-FOPAs will be given and the suitability of different configurations will be investigated. Then, a model of an optical regenerator for DPSK signals based on dual pump degenerate configuration will be proposed for simultaneous phase and amplitude regeneration. As expected, when operating in moderate saturation, the regenerator can reduce PN to AN conversion resulting with improved performance in terms of both phase and amplitude. In addition, the effect of pump phase modulation on the performance of the regenerator is investigated. Since phase modulated pumps can allow in principle increased SBS threshold, it is important that modulation is not transferred on idler/signal, so that the regenerative process can be effective. It will be shown that when the pumps are counter-phase modulated, the performance of the regenerator remains unchanged. Subsequently, QPSK regeneration will be addressed and a new regenerator based on a dual pump non-degenerate configuration will be modeled and presented. The results will demonstrate evident phase and amplitude noise suppression. Furthermore, the concept of multichannel optical regeneration will be discussed and a regenerator will be proposed for simultaneous regeneration of two DPSK channels by using a common nonlinear medium. Successful phase regeneration will be demonstrated for both channels at the output of the regenerator.

Biography:

Valerija Kamchevska was born in Shtip, Macedonia. She received a BSc degree in Electrical engineering and information technologies, specialty Telecommunication from the Ss. Cyril and Methodius University, Skopje, Macedonia in 2011. Immediately after graduation, she was awarded an Erasmus Mundus scholarship for attending the Master in Photonic networks engineering (MAPNET). As part of the program, she attended lectures in Scuola Superiore Sant Anna, Pisa, Italy; Aston University, Birmingham, United Kingdom and did her Master thesis at the Technical University of Berlin, Berlin, Germany. Her main research interests include high-speed optical processing, advanced modulation formats and nonlinear optics.