Abstract
A simple and robust all-optical nonreturn-to-zero to return-to-zero (RZ) format converter is demonstrated and investigated using a semiconductor optical amplifier (SOA) and a reconfigurable delayed interferometer. The scheme can be used to convert input signals at different bit rates and obtain converted signals with tunable duty cycles. Format conversion at is achieved with a negative power penalty of at a bit-error rate of . Transmission of the converted RZ signal over a dispersion-managed fiber link of results in only a small power penalty of . In addition, the format converter is found to be insensitive to the power fluctuation of the optical clock, as the SOA works in the saturation regime.
© 2010 Optical Society of America
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