The effects of optical phase-conjugate feedback on the characteristics of stripe-geometry gain-guided GaAlAs lasers are theoretically investigated using a model based on the beam-propagation method. Compared to standard diode lasers, the use of a phase-conjugate mirror yields lower threshold currents and improves the optical quality of the output beam over a wide range of stripe widths and cavity lengths. The results obtained for 3 mu m stripe lasers are particularly noteworthy since the twin-peaked far field of standard lasers can become single lobed. Moreover, when one cleaved facet is replaced by a phase-conjugate mirror having the same overall reflectivity, the threshold current can be reduced by more than 50% for short cavity lengths.>
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Champagne et al. (1989) studied this question.
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