AlGaInAs-InPMicrocylinder Lasers Connected With an Output Waveguide

AlGaInAs-InPmicrocylinder lasers connected with an output waveguide are fabricated by planar technology. Room-temperature continuous-wave operation with a threshold current of 8 mA is realized for a microcylinder laser with the radius of 10 mu m and the output waveguide width of 2 mu m. The mode Q-factor of 1.2 x 10(4) is measured from the laser spectrum at the threshold. Coupled mode characteristics are analyzed by 2-D finite-difference time-domain simulation and the analytical solution of whispering-gallery modes. The calculated mode Q-factors of coupled modes are in the same order as the measured value.

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This work was supported by the National Nature Science Foundation of China under Grant 60777028, Grant 60723002, and Grant 60838003, by the Major State Basic Research Program under Grant 2006CB302804, and by the project of the National Laboratory for Tsinghua Information Technologies.

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This work was supported by the National Nature Science Foundation of China under Grant 60777028, Grant 60723002, and Grant 60838003, by the Major State Basic Research Program under Grant 2006CB302804, and by the project of the National Laboratory for Tsinghua Information Technologies.