All-optical packet switching and label buffering have been demonstrated using multimode interference bistable laser diode optical flip-flops and all-optical Mach-Zehnder interferometer switches. The optical flip-flop buffered the injected optical label for the one packet duration and drove the all-optical switch through cross-phase modulation to switch the optical packet. Error-free operation for output 10-Gb/s optical packets from the switch was obtained with negligible power penalty. The presented packet switching has potential of ultrafast switching and transparency of data rate and format, and will be useful in the future optical packet switching networks.
40-GHz subharmonic optical clock recovery has been demonstrated using an optoelectronic oscillator (OEO) injection locked by 160-Gb/s data streams. The data streams are coupled to a photodetector in the OEO feedback loop after transmitted through a LiNbO3 intensity modulator, which enhances the residual subharmonic clock component in the data streams. The pulse width and root-mean-square timing jitter of the recovered clocks are 9.03ps and 221fs (10Hz-40MHz), respectively.