The performance of an actively mode-locked coupled-stripe Alx′Ga1−x′As-AlxGa1−xAs quantum well laser in a tunable external cavity is described. Pulses as short as 50 ps are measured and a tuning range of Δℏω∼37 meV>kT, which is not the limit, is demonstrated. The existence of the transverse modes of coupled-stripe lasers increases significantly the spectral density of available lasing modes (for mode locking) compared with a single-stripe laser.
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Epler et al. (1985) studied this question.
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