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Scanning electron microscope picture of a long microlaser with distributed Bragg reflectors at both ends of the laser resonator. By optimizing the etching process, smooth perpendicular edges are attained (see inset).
Temperature dependence of the threshold current for two microlasers, one with a resonator length of (dots) and the second one with a shorter cavity of only (triangles).
(Color online) Light output characteristics of a long microlaser at various selected heat sink temperatures. The threshold currents show good stability up to the maximum operation temperature of for this device (see inset).
(Color online) High resolution single mode spectrum of a long microlaser at , measured in pulsed operation with a pulse rate of , and a pulse width of with a drive current of .
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