Reconfigurable optical add/drop multiplexer with a function of optical reamplification, retiming and reshaping

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Wavelength selective switch using refractive index variation in the QW structure and semiconductor optical amplifier using QDs structure have studied to realize the reconfigurable optical add/drop multiplexer with a function of optical reamplification, retiming and reshaping. We have fabricated the wavelength switch that can demultiplex the wavelength and switch the output port. Fundamental wavelength switching has shown using refractive index change in the QW structure. We have successfully demonstrated the strain control of the QDs using double-cap procedure, and have obtained the QDs LED more than 400nm spectrum width by the control of QDs height and strain of buffer layer.