By utilizing two electrodes on a conventional uniform-grating distributed feedback (DFB) injection laser, the usual two-mode DFB laser degeneracy has been removed to permit (1) single-frequency operation with 33-dB side-mode suppression and (2) current-controlled switching between the two modes, separated by a 10–25 Å stop band, in less than 1 ns.
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Liou et al. (1987) studied this question.
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