We present a phase locking scheme that enables the demonstration of a practical dual pump degenerate phase sensitive amplifier for 10 Gbit/s non-return to zero amplitude shift keying signals. The scheme makes use of cascaded Mach Zehnder modulators for creating the pump frequencies as well as of injection locking for extracting the signal carrier and synchronizing the local lasers. An in depth optimization study has been performed, based on measured error rate performance, and the main degradation factors have been identified.
Bibliographical note© 2011 OSA
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.19.012384. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Sygletos, S., Ibrahim, S. K., Weerasuriya, R., Phelan, R., Grüner-Nielsen, L., Bogris, A., Syvridis, D., O'Gorman, J., & Ellis, A. D. (2011). Phase synchronization scheme for a practical phase sensitive amplifier of ASK-NRZ signals. Optics Express, 19(13), 12384-12391. https://doi.org/10.1364/OE.19.012384