A simple and power-efficient, all-optical format conversion from 10 Gbit/s RZ-OOK to BPSK is demonstrated using a single semiconductor optical amplifier and optical bandpass filtering. A receiver sensitivity penalty of ∼1 dB relative to baseline RZ-OOK was obtained for ∼−0.17 nm filter detuning relative to the probe carrier wavelength.
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Astar et al. (2006) studied this question.
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