L.F.K. Lui

All-optical bit-error monitoring system using cascaded inverted wavelength converter and optical NOR gate

A novel all-optical bit-error monitoring system is demonstrated by cascading two all-optical logic gates: an inverted wavelength converter and an optical NOR gate which are realized using injection-locked laser diodes operating at different thresholds. Real-time optical monitoring signal is generated which indicates the positions and duration of both bit and burst errors in 10-Gb/s nonreturn-to-zero signals.

Demonstration of an all-optical switch by use of a multiwavelength mutual injection-locked laser diode

Error-free all-optical packet switching is demonstrated by use of a multiwavelength mutual injection-locked Fabry-Perot laser diode. A 10-Gbit/s data signal is switched on and off with an extinction ratio of 16.9 dB when an optical control signal is turned off and on with a power difference of only 3 dB.

All-optical add–drop node for optical packet-switched networks

We have demonstrated all-optical packet add-drop for all-optical packet-switched networks. Intelligent all-optical add-drop of packets is performed, based on all-optical processing of packet headers. The header and payload rates are 5 and 10 Gbits/s, respectively.

Simultaneous all-optical waveform reshaping of two 10-Gb/s signals using a single injection-locked Fabry-Perot laser diode

All-optical waveform reshaping of a distorted 10-Gb/s nonreturn-to-zero (NRZ) pseudorandom bit sequence (PRBS) signal using two-mode injection locking in Fabry-Perot laser diode (FP-LD) was demonstrated. Simultaneous waveform reshaping of two 10-Gb/s distorted NRZ PRBS signals using a single FP-LD was also demonstrated.

All-Optical Clock Recovery Using Erbium-Doped Fiber Laser Incorporating an Electroabsorption Modulator and a Linear Optical Amplifier

We demonstrated a 10-GHz all-optical clock recovery system using an erbium-doped fiber laser that incorporates an electroabsorption modulator and a linear optical amplifier. Stable pulses with peak power of 200 mW and pulsewidth of 6 ps are obtained. The output power and the pulsewidth of the recovered clock pulses are independent of the input data pattern. Stable optical clock can still be observed when the input data rate varies by more than 60% of the fundamental frequency without any optical tunable delay line inside the laser cavity. The scheme is essentially wavelength transparent for the whole C-band which recovers clock pulses from input data wavelength between 1525 and 1565 nm

40 Gb/s optical clock recovery based on an optical parametric oscillator with photonic crystal fiber

We demonstrate a 40 Gb/s optical clock recovery based on optical parametric oscillator using a highly nonlinear photonic crystal fiber as the dynamic gain medium.

Demonstration of all-optical packet demultiplexing using a multiwavelength mutual injection-locked laser diode

All-optical packet demultiplexing is demonstrated using a multiwavelength mutual injection-locked Fabry-Perot laser diode. Error-free packet-demultiplexing of a 10 Gb/s signal with an extinction ratio of 16.9 dB is observed.

An all-optical on/off switch using a multi-wavelength mutual injection-locked Fabry-Perot laser diode

All-optical on/off switch is demonstrated using multi-wavelength injection-locked Fabry-Perot laser diode. A 10 Gb/s data signal is switched on and off with an extinction ratio of -16 dB measured in spectrum domain by an optical control signal.

All-optical packet switching of 160 Gb/s packets with all-optical processing of 10 Gb/s headers

We report the first demonstration of all-optical packet switching of 160 Gb/s packets with all-optical header processing of the 10 Gb/s packet headers. The timing diagrams before and after packet switching are shown.

All-optical packet switching with all-optical header processing and 2R regeneration

We demonstrate a 1/spl times/4 10 Gb/s all-optical packet switch with all-optical header processing and 2R regeneration using injection-locked Fabry-Perot lasers diodes. The header and payload rates are 5 Gb/s and 10 Gb/s respectively.