Abstract

An OC-192 optical return-to-zero- (RZ-) formatted OR logic gate is experimentally demonstrated and theoretically interpreted for the first time to our knowledge. It is implemented by using a data format converter based on an optically injection-locked Fabry–Perot laser diode (FPLD) modulated in below-threshold condition. By injecting two non-return-to-zero data streams into the FPLD-based OR gate, a peak-power-equalized RZ-formatted OR logic data stream extinction ratio of >8dB is obtained from the FPLD with optimized rf-modulating and optical injecting powers of 24.7 and >4dBm, respectively. The highest data rate of up to 12.5Gbitss with a bit error rate (BER) of 1013 at a received optical power of >16dBm can be achieved by increasing the dc bias current of the FPLD-based RZ-formatted OR logic gate to 8mA. The OR-gated RZ data stream exhibits a duty cycle (pulse width) of 27% (27ps) and a 0.5dB power penalty at a BER of 109 at a data rate of 9.953Gbitss.

© 2005 Optical Society of America

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