Theory of slow-light semiconductor optical amplifiers

Marco Saldutti*, Thorsten S. Rasmussen, Mariangela Gioannini, Jesper Mørk

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


We have developed an efficient framework for analyzing the reflection and transmission properties of semiconductor photonic crystal optical amplifiers. Specifically, we have investigated the use of slow light to enhance the gain of short integrated amplifiers. We find that the expected enhancement in transmission is limited by distributed feedback induced by the material gain itself. Such back-scattering is further enhanced by the refractive index variation associated with the linewidth enhancement factor. The inclusion of this effect reveals that for a given material gain, devices with smaller linewidth enhancement factor may offer better performance.

Original languageEnglish
JournalOptics Letters
Issue number21
Pages (from-to)6022-6025
Publication statusPublished - 1 Nov 2020

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