Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 24, Issue 3, Pages 179-181Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2174783
Keywords
Format conversion; higher order modulation formats; integrated optics; phase modulation
Funding
- European Union [258846, 224326]
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A generic scheme for return-to-zero (RZ) to nonreturn-to-zero (NRZ) format conversion of optical signals is analyzed. It relies on a simple delay interferometer with frequency periodicity twice as high as the input symbol rate and a subsequent optical band-pass filter. Simulation results at 40 Gbaud indicate the compatibility of the technique with a variety of advanced modulation formats. RZ-to-NRZ conversion of 40 Gb/s differential phase shift keying signals is experimentally demonstrated with 1.5 dB power penalty compared to the back-to- back measurement.
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