Eight-channel microdisk CW laser arrays vertically coupled to common output bus waveguides

1.6-nm spectrally spaced eight-channel semiconductor microdisk laser arrays are presented, where high-Q disk lasing modes are vertically coupled out through a common bus waveguide. The spectral channel spacing is achieved by varying the disk resonator radii from 10.6 to 10.95 mum. Typical linewidth of 0.25 nm and side-mode suppression ratio of -20 dB are observed under continuous-Wave lasing operation near lambda = 1.51 mum. This is the first demonstration of integrated microresonator laser arrays.