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Journal of the Optical Society of America B

Dynamic behavior of bistability in a laser with a saturable absorber

E. Arimondo, Didier Dangoisse, C. Gabbanini, E. Menchi, F. Papoff

Published Jun 1, 1987• 31 citations
Publisher

Abstract

Optical bistability in a CO2 infrared laser containing SF6 as a saturable intracavity absorber has been studied under dynamic conditions as a function of a time-dependent laser control parameter. The width of the optical bistability region, the fluctuations in the bistability switching values, and the dependence on the initial conditions have been investigated in this transient optical bistability. A numerical solution of the laser rate equations provides a good interpretation of the experimental results, but some experimental observations cannot be completely explained.

DOI
10.1364/josab.4.000892

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Precise Measurements of Bistability in a CO2 Laser with Intracavity Saturable Absorber

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Optical bistability in a laser with an intracavity saturable absorber is a phenomenon theoretically investigated firstly by Lugiato et al(1). The experimental observations in CO2 lasers(2,3) have provided clear evidence of the bistability phenomenon and shown that the absorber parameters could be determined from these observations. In this work a quantitative comparison between a theoretical description of optical bistability and the experimental results is presented for the first time. The parameters defining the laser cavity and the CO2 amplifying medium were measured carefully, and the bistability was observed and analyzed quantitatively as a function of the laser parameters.

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Optical bistability in a laser containing a saturable absorber

Smail Djabi, H. Boudoukha, M. Djabi

In this work, the theory of optical bistability for the homogeneously broadening of a nonlinear absorber inside Fabry-Perot interferometer is treated. The theoretical influence of the resonator losses on the optical bistability is examined mainly in the cases for which losses depend on both the mode frequency and the density of photons. On the basis of the Rate Equation Approach (REA), we analytically and numerically solved this type of equation for stationary case.

Annales de Physique•Jan 1, 2007•3 citations
Optical bistability in a CO2 infrared laser containing SF6 as a saturable intracavity absorber has been studied under dynamic conditions as a function of a time-dependent laser control parameter. The width of the optical bistability region, the fluctuations in the bistability switching values, and the dependence on the initial conditions have been investigated in this transient optical bistability. A numerical solution of the laser rate equations provides a good interpretation of the experimental results, but some experimental observations cannot be completely explained.
Optical bistability in a laser with an intracavity saturable absorber is a phenomenon theoretically investigated firstly by Lugiato et al(1). The experimental observations in CO2 lasers(2,3) have provided clear evidence of the bistability phenomenon and shown that the absorber parameters could be determined from these observations. In this work a quantitative comparison between a theoretical description of optical bistability and the experimental results is presented for the first time. The parameters defining the laser cavity and the CO2 amplifying medium were measured carefully, and the bistability was observed and analyzed quantitatively as a function of the laser parameters.
Abstract In the first part we give a brief review of some theoretical problems that still hinder the practical use of bistable optical devices in logic circuits. In the second part we study the influence of a time-dependent control parameter on the solution of differential equations. We prove that even for small sweeping rates large delays can be expected, resulting in the dynamical stabilization of unstable solutions. Examples are given for dynamically induced optical bistability in a laser and dynamical stabilization in a laser with saturable absorber.