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Tristability and self-oscillations in a double resonator system

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<mark>Journal publication date</mark>15/01/1991
<mark>Journal</mark>Optics Communications
Issue number5-6
Number of pages9
Pages (from-to)444-452
Publication StatusPublished
<mark>Original language</mark>English


A system consisting of two coupled Fabry-Perot resonators, one of them nonlinear, with an additional feedback between them is studied experimentally and theoretically. The dependence between the phase shift δφ of the resonator 2 and the laser-induced thermal load Q applied to the resonator 1 is essentially nonlinear. This nonlinearity of the additional feedback in the double resonator system is shown to make possible its self-oscillations and the existence of the tristable 8-shaped hysteresis curves. The frequencies of the observed self-oscillations are in the range from 100 Hz to 100 kHz, their shapes varying from sinusoidal to square and sawtooth.