科研之友
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摘要
We propose high-speed modulation of hybrid silicon lasers through modulation of the photon lifetime tau(p). Two structures are presented to achieve tau(p)-modulation by modifying the distributed loss or the feedback coefficient of the laser cavity. By using small-signal modeling and the finite-difference method, the responses in the frequency and time domains are given. It is shown that it is possible to achieve a 3 dB bandwidth of over 100 GHz and a high data transmission rate of more than 50 GHz. The theoretical analysis also shows that the chirp due to the variations of the carrier densities in the gain/modulation sections is very small.
- 出版日期2009-12-17
