A systematic investigation of the phenomenon of transverse multistability in the laser, in the sense that in the same operating conditions the system can exhibit outputs which differ with respect to the transverse profile of the electric field, was begun. These configurations arise from the locking of a certain subset of the empty cavity modes with different combinations for their amplitudes and phases. Examples of bistability and tristability were discovered. In the tristable case, a linear stability analysis was performed for the three single-mode stationary solutions corresponding to the empty cavity modes. In appropriate conditions the laser can oscillate with three different transverse profiles for the electric field, and, according to the initial condition, the system approaches one of the three states. Two of them have the same transverse configuration for the output intensity and can be physically distinguished, for example, by an astigmatic imaging technique. The two different transverse profiles for the intensity of the three stationary states are shown. A decision-making system based on competition among the different multistable transverse configurations is being studied. The approach provides a physical realization of a general conceptual scheme recently devised for pattern recognition and associative memories.

Transverse optical multistability and associative memories

PRATI, FRANCO;
1990-01-01

Abstract

A systematic investigation of the phenomenon of transverse multistability in the laser, in the sense that in the same operating conditions the system can exhibit outputs which differ with respect to the transverse profile of the electric field, was begun. These configurations arise from the locking of a certain subset of the empty cavity modes with different combinations for their amplitudes and phases. Examples of bistability and tristability were discovered. In the tristable case, a linear stability analysis was performed for the three single-mode stationary solutions corresponding to the empty cavity modes. In appropriate conditions the laser can oscillate with three different transverse profiles for the electric field, and, according to the initial condition, the system approaches one of the three states. Two of them have the same transverse configuration for the output intensity and can be physically distinguished, for example, by an astigmatic imaging technique. The two different transverse profiles for the intensity of the three stationary states are shown. A decision-making system based on competition among the different multistable transverse configurations is being studied. The approach provides a physical realization of a general conceptual scheme recently devised for pattern recognition and associative memories.
1990
M., Brambilla; L., Lugiato; Prati, Franco; C., Tamm; C., Weiss
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1792417
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