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We investigated the resonator modes of a two-dimensional quasi-stadium laser diode with concave end mirrors by using an extended Fox-Li mode calculation method. The resonator modes were found to have a significant wavelength dependence due to beam interference in the laser cavity. A scar mode was observed in which optical beams are localized on unstable periodic orbits at a wavelength at which the...
We found alternate oscillations in AlGaAs/GaAs single-quantum-well (SQW) quasi-stadium laser diodes (QSLD). The alternate oscillations in QSLD can be well explained by the interactions of two different cavity modes due to the geometrical symmetry of QSLD. We also showed the alternate oscillation frequencies are inversely proportional to the amplitudes of two different cavity modes.
We found alternate oscillations in AlGaAs/GaAs single-quantum-well (SQW) quasi-stadium laser diodes (QSLD). The alternate oscillations in QSLD can be well explained by the interactions of two different cavity modes due to the geometrical symmetry of QSLD. Unlike the alternate oscillations in semiconductor ring lasers that need the waveguides to extract the light signals, the alternate oscillation...
We report a demonstration of lasing in a two-dimensional (2D) microcavity which is a semiconductor diode structure with a stadium shape finely formed by reactive-ion-etching technique and pumped by electric current injection. The laser exhibits output over a wide angle, although the fundamental lasing modes have highly complex wave structures which do not correspond to any simple set of rays inside...
Mode switching operation of multi-electrode strained InGaAsP multiple-quantum-well quasi-stadium laser diodes is reported. Far-field patterns exhibit highly directional emission along the laser cavity axis for current injection at the axis electrode and highly directional emission at angles plusmn19deg from the cavity axis for current injection at the ring electrode
We demonstrate mode switching in tandem quasi-stadium laser diodes. Switching is achieved by optical injection between lasing in the cavity axis and the closed ring trajectory of a quasi-stadium laser resonator.
The relation between resonator modes and unstable periodic orbits in a fully chaotic quasi-stadium laser resonator is investigated. The complicated wavelength dependence of the power-coupling coefficient is explained by a simple coupling model, which considers some unstable periodic orbits
Lasing modes in a two-dimensional quasistadium resonator with confocal curved end-mirrors were investigated. Asymmetric output beam emission was obtained by the locking of two modes of different symmetry classes corresponding to a closed ring-trajectory.
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