The use of the time-dependent transfer matrix and wide-angle beam propagation method is proposed to improve the computational speed and accuracy of a recently developed timedomain traveling-wave model of vertical-cavity surface-emitting lasers. With suitable utilization of the transfer matrix, significant reduction of the total execution time of the traveling-wave model can be obtained. In addition, the use of wide-angle beam propagation method can minimize the calculation error of the

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... -wave model due to the diffraction of light from the small aperture of the laser cavity. Index Terms-Diffraction loss, Padé approximant propagation operator, semiconductor device modeling, surface-emitting devices, transfer matrix method.