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An equivalent–asymmetric coupling coefficient (EACC) distributed feedback laser (DFB) semiconductor laser with equivalent-half apodization grating (EHAG) structure is proposed and experimentally demonstrated for the first time; the EHAG profile is equivalently realized by linearly changing the duty cycle of a sampled Bragg grating along the one half cavity, while that of the other half cavity is kept...
Based on reconstruction equivalent chirp (REC) technology, we propose a special structure for distributed feed-back (DFB) lasers realized by changing the duty cycle of one side in sampling Bragg grating, thus the equivalent apodization is introduced in this side, resulting into the magnitude of the equivalent index modulation is varied and smaller than the other side. As a conventional equivalent...
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