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20-Gb/s All-Optical Format Conversions From RZ Signals With Different Duty Cycles to NRZ Signals

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5 Author(s)
Yu Yu ; Huazhong Univ. of Sci. & Technol., Wuhan ; Xinliang Zhang ; Dexiu Huang ; Lijun Li
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An all-fiber delay interferometer and narrowband filter based an all-optical format conversion scheme, which can convert return-to-zero (RZ) signals with variable duty cycles to nonreturn-to-zero signals, is proposed and demonstrated. The passive converter is independent of wavelength and input power. The operation principle is analyzed and simulated. Experimental results of 20-Gb/s RZ signals with three different duty cycles accord well with the simulation results. The bit-error-rate measurements show the good performance of the proposed scheme. The conversion performances of different wavelengths and parameters are also discussed.

Published in:

IEEE Photonics Technology Letters  (Volume:19 ,  Issue: 14 )