| Abstract | We report single and double quantum well electroabsorption waveguide modulators that achieve exceptional performance as both lasers and modulators. Contrast ratios of 19 and 26 dB for a 400 μm long device have been achieved for the single and double well samples, respectively. When operated as lasers, the devices exhibit broad area threshold current densities of 56 A/cm2 and 87 A/cm2 for the single and double well samples, for cavity lengths longer than 3 mm. In addition, measurements of lasing wavelength versus cavity length show that both devices can operate as lasers at wavelengths compatible with their respective modulator performance. |
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