We propose an all-optical modulation format conversion scheme from non-return-to-zero on-off-keying (NRZ-OOK) to return-to-zero (RZ) M-ary phase-shift-keying (PSK) based on fiber nonlinearity. The proposed conversion scheme is numerically investigated and experimentally demonstrated with the error-free operation of NRZ-OOK/RZ- quadrature PSK (QPSK) conversion at 10.7 Gsymbol/s.

© 2008 Optical Society of America

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