Small-signal response of a lamba/4-shifted MQW DFB laser as a three-level system

Alberto de Deus Sarmento; Mario F. S. Ferreira

doi:10.1117/12.236943

1 April 1996 Small-signal response of a lamba/4-shifted MQW DFB laser as a three-level system

Alberto de Deus Sarmento, Mario F. S. Ferreira

Proceedings Volume 2684, High-Speed Semiconductor Laser Sources; (1996) https://doi.org/10.1117/12.236943
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

The small-signal response of a (lambda) /4-shifted multiple-quantum well (MQW) distributed feedback (DFB) laser is investigated. The gain spectrum shows two major peaks located at the lowest heavy-hole and light-hole transitions. Therefore, the MQW DFB laser is treated as a three-level system. In the low-power range the heavy-hole transition dominates, while in the high-power range there is a mixing of the heavy-hole and the light-hole transitions. It is shown that the dynamic response of the MQW DFB laser is significantly affected by the contribution due to the light-hole transition. Its dependence on the number of quantum wells and on the coupling coefficient of the grating ((kappa) ) is also discussed.

Citation Download Citation

Alberto de Deus Sarmento and Mario F. S. Ferreira "Small-signal response of a lamba/4-shifted MQW DFB laser as a three-level system", Proc. SPIE 2684, High-Speed Semiconductor Laser Sources, (1 April 1996); https://doi.org/10.1117/12.236943

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