In this work we present a wavelength converter based on a Michelson interferometer. It is obtained by monolithic integration of two-semiconductor optical amplifiers with a passive waveguided X-coupler incorporating turning mirrors. It operates in the 1.55 mu m spectral window and allows the wavelength conversion of data streams up to 10 Gb/s, showing open-eye diagrams and extinction-ratio regeneration capabilities. Comparison of two structures with different active layers and their influence on the polarization sensitivity is also presented.