Caractérisations de structures à base d'îlots, bâtonnets quantiques en termes de bruit, non linéarité et d'injection optique

Abstract : This thesis focuses on laser diodes made of Quantum Dot/Quantum Dash (QD) structures. These devices have attracted considerable attention due to their remarkable properties, such as high gain, high non-linear effects, low laser-threshold, high thermal stability, etc. Our studies based on RIN (Relative Intensity Noise) and optical injection show unusual behaviour of QD lasers. We have compared the RIN of a QDash DFB laser with a ''classical'' (massif or quantum well) DFB laser as well as for Fabry-Perot type QDot/QDash lasers. Analytical simulations have been faced to experimental results and show the role of the wetting layer. Contrary to what is observed with ''classical lasers'', optical injection exhibits many regimes with strong non-linear dynamics when the laser is biased near the threshold, while there is only a very few regimes at moderate pump. All these results demonstrate a strong coupling with strong dumping between the longitudinal modes through the wetting layer, which is a very interesting point for the understanding of mode-locking in these QDot/QDash structures.
Complete list of metadatas

Cited literature [158 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00940272
Contributor : Abes Star <>
Submitted on : Friday, January 31, 2014 - 4:37:26 PM
Last modification on : Wednesday, July 3, 2019 - 5:18:17 PM
Long-term archiving on: Sunday, April 9, 2017 - 4:56:09 AM

File

HAO_Zhenyu.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00940272, version 1

Citation

Zhenyu Hao. Caractérisations de structures à base d'îlots, bâtonnets quantiques en termes de bruit, non linéarité et d'injection optique. Autre [cond-mat.other]. Université Rennes 1, 2013. Français. ⟨NNT : 2013REN1S096⟩. ⟨tel-00940272⟩

Share

Metrics

Record views

416

Files downloads

2005