Zusammenfassung
An all-optical set-reset flip-flop is presented that is based on two
coupled lasers with separate cavities and lasing at different wavelengths.
The lasers are coupled so that lasing in one of the lasers quenches
lasing in the other laser. The flip-flop state is determined by the
laser that is currently lasing. A rate-equation based model for the
flip-flop is developed and used to obtain steady-state characteristics.
Important properties of the system, such as the minimum coupling
between lasers and the optical power required for switching, are
derived from the model. These properties are primarily dependent
on the laser mirror reflectivity, the inter-laser coupling, and the
power emitted from one of the component lasers, affording the designer
great control over the flip-flop properties. The flip-flop is experimentally
demonstrated with two lasers constructed from identical semiconductor
optical amplifiers (SOAs) and fiber Bragg gratings of different wavelengths.
Good agreement between the theory and experiment is obtained. Furthermore,
switching over a wide range of input wavelengths is shown; however,
increased switching power is required for wavelengths far from the
SOA gain peak
Nutzer