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Frontiers in Optics

Optical bistability in a Fabry-Perot quantum-well saturable absorber

Yongan Tang, Azad Z. Siahmakoun, Sergio Granieri, Mircea D. Guina, M. Pessa

Published Jan 1, 2005• 0 citations
Publisher

Abstract

Resonant and anti-resonant Fabry-Perot saturable absorbers (FPSA) are MBE grown using Ga0.47In0.53As/InP 7nm and 9nm thick layers to operate in 1550nm. Theoretical simulation and experimental investigation of optical bistability in these FPSA will be presented.
DOI
10.1364/fio.2005.jtuc41

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In this paper, we develop a theoretical model that accurately describes the nonlinear phenomenon of optical bistability in Fabry-Perot laser containing a saturable absorber "LSA". We present an analytical model for optical bistability in a LSA. The physics of optical bistability in a classical optical resonant system such as Fabry-Perot etalon has been well-established, and can be described by simple analytical models. The photon intensities were determined as a function of the pumping rate of the active medium, and we analyzed the linear stability of the stationary solutions obtained.
The optical bistability (OB) behavior of single-mode Fabry- Perot lasers containing saturable absorber (LSA) is presented on the basis of the rate equations with allowance for spontaneous emission and spatial hole-burning. Special attention is paid to the case of dominant inhomogeneous broadening in both Lorentzian and Gaussian models. The OB occurrence conditions are clearly displayed in phase diagrams. The influence of the main LSA parameters on OB characteristics as well as on OB curves' stability are investigated in detail. Some practical suggestions for optimizing the bistable operation in LSA are also given.
Abstract Optical bistabilities have been considered to be useful for sensor applications. As a typical nonlinear device, Fabry-Perot semiconductor optical amplifiers (FPSOAs) exhibit bistability under certain conditions. In this paper, the bistable characteristics in FPSOAs are investigated theoretically. Based on Adams’s relationship between the incident optical intensity I in and the z -independent average intracavity intensity I av , an analytical expression of the bistable loop width in SOAs is derived. Numerical simulations confirm the accuracy of the analytical result.