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The in-phase lateral- and single-longitudinal-mode operation of a 1.5- mu m GaInAsP/InP laser array was demonstrated. The array consists of a positive-index-guide multiple-stripe array region and an unguided grating filter region. The advantage of this laser array is experimentally confirmed by comparing with the multiple-stripe DFB type laser array without the grating filter.>
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Dong et al. (1992) studied this question.
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