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Acta Physica Sinica

OPTICAL SWITCHING AND BIST ABILITY IN A FABRY-PEROT INTERFEROMETER CONTAINING PLASMA

Zhong Quande, 中国科学院物理研究所

Published Jan 1, 1985• 1 citation
Publisher

Abstract

In this paper, the optical switching and bistability of a Fabry-Perot interferometer filled with plasma are studied theoretically. In the plane-wave approximation a equilibrium state equation which shows nonlinear transmission-intensity characteristic is derived. The critical detuning and the general formulae of "on " and "off" intensities for bistable operation are presented. A numerical example is given.

DOI
10.7498/aps.34.182

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In this paper, the optical switching and bistability of a Fabry-Perot interferometer filled with plasma are studied theoretically. In the plane-wave approximation a equilibrium state equation which shows nonlinear transmission-intensity characteristic is derived. The critical detuning and the general formulae of "on " and "off" intensities for bistable operation are presented. A numerical example is given.
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A general theory of optical bistability for a homogeneously broadened two-level system in a Fabry-Perot interferometer is presented. Both absorptive and dispersive mechanisms are included, and in the mean-field approximation a cubic state equation is derived relating transmitted intensity to all physical parameters. From the perspective of catastrophe theory, this equation describes an elementary cusp catastrophe. We show that bistable switching may follow not only from sweeping the incident laser intensity, but also with continuous variation of atomic or cavity detuning, or atomic density, with the laser intensity fixed. For the case having incident intensity as the variable control, the domain of bistability is studied in some detail as a function of the remaining fixed parameters. Stability criteria are considered for the general case including both absorption and dispersion.
We study the nonlinear optical bistability and multistability of a nonlinear ferroelectric (FE) Fabry-Perot (FP) interferometer assumed coated with partial dielectric mirrors on its interfaces. The FE material is considered to have an intensity-dependent refractive index where the third order nonlinear susceptibility χ ilmn (3) acts like Kerr coefficient. The nonlinear response of the FE medium is modeled by the Landau-Khalatnikov (LK) dynamical equation. Within a single frequency approximation, the nonlinear wave equation is written in terms of polarization P rather than the electric field E as the dependent variable. The resulting nonlinear polarization equation is numerically integrated across the FP film using the fourth order Runge-Kutta method. The behavior of the resulting polarization and transmission as a function of the field input intensity is investigated.