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Physical Review A

Stabilization of unstable stationary states in optical bistability

B. Macke, J. Zemmouri, N. E. Fettouhi

Published Mar 1, 1993• 12 citations
Publisher

Abstract

The use of a very simple technique of proportional feedback is proposed to stabilize an optical bistable system on the entire middle branch of its steady-state characteristic without otherwise altering the system. The conditions of stabilization are analyzed and the efficiency of the method is experimentally demonstrated.
DOI
10.1103/physreva.47.r1609

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We report on the switching dynamics of a bistable device in the case when a holding power maintains the system in a stable state of the lower branch and a pulse address of finite duration (T) brings it close to the unstable state of the middle branch. For a critical pulse duration (Tc) the pulse exactly brings the device in the unstable state where it would indefinitely remain in the absence of fluctuations. For pulse duration close to Tc the device switches up to the upper branch (T>Tc) or relaxes to the initial state (T<Tc) after a lethargy time which follows a logarithmic law {1,2}.