High-efficiency, high-speed, tapered-oxide-apertured 980 nm vertical-cavity surface-emitting lasers (VCSELs) with 35 Gbit/s error-free operation have been demonstrated. This is the highest data rate reported for directly modulated VCSELs to date. The devices are also highly efficient, showing a record-high data-rate/power-dissipation ratio of 3.5 Gps/mW.
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Chang et al. (2007) studied this question.
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