Impact of the saturable absorber on the linewidth enhancement factor of hybrid silicon quantum dot comb lasers (Student paper)
Résumé
This work investigates the effects of the saturable absorber on the linewidth enhancement
factor of hybrid silicon quantum dot comb lasers, which is a key parameter involved in
frequency comb generation. Experiments have been performed on two carefully chosen laser
devices sharing the same gain material and cavity design, with and without saturable
absorber. The results unveil that the increase of the reversed bias on the absorber drives up
the linewidth enhancement factor, which gives birth to the comb spectrum. This paper brings
insights on the fundamental aspects of comb lasers and provides concepting guidelines of
future on-chip light sources for integrated wavelength-division multiplexing applications.
Keywords: Quantum dots, frequency combs, linewidth enhancement factor, silicon photonics.
Origine | Accord explicite pour ce dépôt |
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