L.Y. Chan

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.

Simultaneous repolarization of two 10-Gb/s polarization-scrambled wavelength channels using a mutual-injection-locked laser diode

An all-optical polarizer, which can repolarize a highspeed data signal without converting the state-of-polarization variations into amplitude jitters, is realized using a mutual injection-locked laser diode. The all-optical polarizer is used to simultaneously realign the state-of-polarizations of two 10-Gb/s polarization-scrambled nonreturn to zero signals without state-of-polarization characterization and feedback control.

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.

Output polarization control of fiber DFB laser using injection locking

Experimental results of a distributed feedback fiber laser injection locked to a Fabry-Perot laser diode are presented. By adjusting the injection power of the fiber laser to the Fabry-Perot laser, high quality laser output with a degree of polarization larger than 95% and sidemode suppression ratio higher than 45 dB was achieved. A 3.8-dB power penalty improvement was also demonstrated in a 41-km 10-Gb/s transmission experiment.

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 add-drop node for packet-switched networks

We 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 Gb/s and 10 Gb/s respectively.

1/spl times/4 all-optical packet switch with all-optical header processing

We demonstrated a 1/spl times/4 all-optical packet switch using injection-locking in a Fabry-Perot laser diode for all-optical header processing and cross gain modulation in an SOA for packet switching.