Abstract
Microcylinder resonators with multiple ports connected to waveguides are investigated by 2D finite-difference time-domain (FDTD) simulation for realizing microlasers with multiple outputs. For a 10 µm radius microcylinder with a refractive index of 3.2 and three 2 µm wide waveguides, confined mode at the wavelength of 1542.3 nm can have a mode Q factor of 6.7 × 104 and an output coupling efficiency of 0.76. AlGaInAs/InP microcylinder lasers with a radius of 10 µm and a 2 µm wide output waveguide are fabricated by planar processing techniques. Continuous-wave electrically injected operation is realized with a threshold current of 4 mA at room temperature, and the jumps of output power are observed accompanying a lasing mode transformation.
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