Measurement of chirp parameter in GaInAs/GaInAsP quantum well electroabsorption modulators by using intracavity modulation

A useful technique for evaluating the chirp parameter alpha of electroabsorption modulators is presented. The alpha parameter of a GaInAs/GaInAsP quantum-well (QW) electroabsorption modulator integrated with an active segment in a Fabry-Perot cavity has been evaluated by measuring the Fabry-Perot fringes. It has been shown that the relationship between absorption changes and refractive index changes is nonlinear and the alpha parameter is dependent on operating wavelengths.<
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