Abstract
In this paper, theoretical analysis of the In–P based 1.55 µm electrically pumped vertical-external-cavity surface-emitting lasers is presented. Computational experimental results show that short-cavity VCSELs (vertical-cavity surface-emitting lasers) with weak external feedback exhibit an increase of 37% output power compared with the conventional VCSELs. In addition, with an optimized external feedback, the −3 dB modulation bandwidth can be increased by approximately 5% and having a wider eye opening in a 40 Gbit s−1 transmission system.
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