Abstract

In this work, analytical study for simulating a Fabry-Perot bistable etalon (F-P cavity) filled with a dispersive optimized nonlinear optical material (Kerr type) such as semiconductors Indium Antimonide (InSb). Because of a trade off between the etalon finesse values and driving terms, an optimization procedures have been done on the InSb etalon/CO laser parameters, using critical switching irradiance (Ic) via simulation systems of optimization procedures of optical cavity. in order to achieve the minimum switching power and faster switching time, the optimization parameters of the finesse values and driving terms on optical bistability and switching dynamics must be studied.
 In addition, for different values of a cavity finesse (for example, F = 25 and 2.37) the switching intensity takes low values with a high finesse etalon compared to a high switching intensity with a low finesse etalon. So, the minimum switching power for a low finesse etalon is ⁓0.785mW, and is about 0.0785mW for a high finesse etalon. The driving term peak of a high finesse etalon becomes higher and the slowing down region becomes less, leading to a fast switching as compared with a slow switching in a low finesse etalon. So that, the minimum switching time was about 300ns for a low finesse etalon, and about 150ns for a high finesse etalon.

Highlights

  • Optical Fabry-Perot cavities are common in laser spectroscopy with interferometry and are frequently used for the stabilization of laser sources [1, 2]

  • The way the driving term varies near the critical switch point for various finesse values (2.37, 15 and 100) are shown in Figs.5-7 respectively

  • For the same percentage of stand-off from the switch point, the driving term peak of a high finesse etalon becomes higher and the slowing down region becomes less, leading to a fast switching as compared with a slow switching in a low finesse etalon

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Summary

Introduction

Optical Fabry-Perot cavities are common in laser spectroscopy with interferometry and are frequently used for the stabilization of laser sources [1, 2]. In order to achieve the minimum switching power and faster switching time, the optimization parameters of the effect finesse values and driving terms on optical bistability and switching dynamics must be studied. (ii)- The effect of the driving terms The Rang-Kutta method [14] of the numerical integration has been used to calculate and to show how the driving term ∂φ(t)/∂t behaves as one changes the holding phase in a bistable loop region This term represents the dynamical equation of nonlinear phase due to the change in cavity detuning induced by the optical nonlinearity.The driving term is given by [14]:. A MATLAP program version seven was used to study the optical bistability, switching dynamics and optimization of a nonlinear FabryPerot etalon It can be seen from Eqs.(7, 8) that the minimum switching power for a low finesse etalon is about 0.785mW, and about 0.0785 mW for a high finesse etalon

Low Finesse High Finesse
Conclusions

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