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The dynamic linewidth of the recently demonstrated tunnelling injection laser is investigated. A significantly smaller dynamic linewidth is measured for this laser in comparison to the separate confinement heterostructure laser. A lower gain compression coefficient for this laser, deduced from measurements of the linewidth enhancement factor and the photon lifetime, is mainly responsible for reducing its dynamic linewidth, owing to the suppression of hot carrier effects by the tunnelling injection mechanism.
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Yoon et al. (1994) studied this question.
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