All-optical Flip-flop based on Optical Beating and Bistability in an Injection-locked Fabry-Perot Laser Diode

All-optical NRZ-to-PRZ format transformer with an injection-locked Fabry-Perot laser diode at unlasing condition.

By using an optical nonreturn-to-zero (NRZ) format data-stream to injection-lock an synchronously modulated Fabry-Perot laser diode at below threshold condition (without DC driving current), an output data-stream with pseudo-return-to-zero (PRZ) format can be generated at bit rate of up to 2.488 Gbit/s. Such an NRZ-to-PRZ format transformation is due to the injectionlocking induced gain-switchi...

All Optical Flip-Flop Based on Coupled Laser Diodes

An all optical set-reset flip flop is presented that is based on two coupled identical laser diodes. The lasers are coupled so that when one of the lasers lases it quenches lasing in the other laser. The state of the flip flop is determined by which laser is currently lasing. Rate equations are used to model the flip flop and obtain steady state characteristics. The flip flop is experimentally ...

Fast all-optical flip-flop based on a single distributed feedback laser diode.

Since there is an increasing demand for fast networks and switches, the electronic data processing imposes a severe bottleneck and all-optical processing techniques will be required in the future. All-optical flip-flops are one of the key components because they can act as temporary memory elements. Several designs have already been demonstrated but they are often relatively slow or complex to ...

Optical bistability in diode-laser amplifiers and injection-locked laser diodes.

Static and dynamic properties of dispersive optical bistability (OH) in semiconductor lasers biased from below to above threshold have been investigated theoretically. The OH result is found to be varied continuously from below to above threshold with its maximum value located just above threshold; this result has been verified experimentally. A much faster switch-off of OH can be expected when...

Tunable Dual-Wavelength Laser Scheme by Optical-Injection Fabry-Perot Laser Diode