Mesa-stripe double-heterostructure lasers operating at room temperature with direct-current bias close to threshold have been directly modulated at gigabit rates. The distortion and ringing effects expected at these frequencies as a result of resonant coupling between photon- and electron-density distributions were found to be suppressed over a range of bias levels. This is thought to result from the multimode behaviour of the device.
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Chown et al. (1973) studied this question.