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Analytical Modeling of the Transistor Laser

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4 Author(s)
Faraji, B. ; Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC ; Wei Shi ; Pulfrey, D.L. ; Chrostowski, L.

We derive analytic expressions for the small-signal modulation response of the transistor laser (TL) operating in the common-emitter (CE) and common-base (CB) configurations. We compare the performance (current gain and small-signal modulation bandwidth) of the TL in these two modes of operation. The CE operation results in a small-signal modulation response with the same relaxation oscillation limitations as conventional lasers. The CB configuration shows a bandwidth enhancement due to a bandwidth equalization together with a suppression of the relaxation oscillations. Finally, we show that the small-signal responses of the CB and CE can be approximated by a third-order transfer function.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:15 ,  Issue: 3 )