All-optical 40-Gb/s RZ-DPSK to phase-incorporated ASK-Manchester format conversion

摘要

Based on a Mach-Zehnder interferometer and optical temporal time delay (OTDL), we propose and demonstrate experimentally an all-optical 40-Gb/s RZ-DPSK to ASK-Manchester format conversion. This obtained ASK-Manchester signals have the phase changes due to the demodulation of RZ-DPSK, which is called as phase-incorporated ASK-Manchester signal. Compared with pure Manchester signal, the simulated results show that the phase-incorporated ASK-Manchester signal has a compact optical spectrum and lower power at the low radio frequency (RF) frequencies, which presents high tolerance on chromatic dispersion and little the cross-talk between payload and label. Moreover, the efficiency and the BER performance of conversion and the dynamic range of fiber input power, transmission length, and chromatic dispersion tolerance of the converted ASK-Manchester are detailed discussed. Less than 1-dB power penalty over 50-km SMF transmission is observed.