All-Optical RZ-to-NRZ Format Conversion with a Tunable FibreBased Delay Interferometer

Abstract

All-optical format conversion from return-to-zero (RZ) tonon-return-to-zero (NRZ) is demonstrated with temperature-controlledall-fibre delay interferometer (DI) at 20 Gb/s. The operation principleis theoretical analysed with the help of numerical simulation andspectra analysis. Theoretical analysis results are consistent well withthe experimental results. The format conversion can be achieved withpower penalty of 0.54 dB and with output extinction ratio 20 dB.