Direct measurement of the spectral dependence of Lamb coupling constant in a dual frequency quantum well-based VECSEL

Gaëlle Brévalle (1) , Salvatore Pes (1) , Cyril Paranthoen (1) , Mathieu Perrin (1) , Christophe Levallois (1) , Cyril Hamel (1) , Alexandru Mereuta (2) , Andrei Caliman (2) , Eli Kapon (2) , Arthur Vallet (3, 4) , Laurent Chusseau (3, 4) , Hervé Folliot (1) , Mehdi Alouini (1)

1 FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON
2 EPFL - Ecole Polytechnique Fédérale de Lausanne
3 IES - Institut d’Electronique et des Systèmes
4 RADIAC - Radiations et composants

Spectral dependence of Lamb coupling constant C is experimentally investigated in an InGaAlAs Quantum Wells active medium. An Optically-Pumped Vertical-External-Cavity Surface-Emitting Laser is designed to sustain the oscillation of two orthogonally polarized modes sharing the same active region while separated in the rest of the cavity. This laser design enables to tune independently the two wavelengths and, at the same time, to apply differential losses in order to extract without any extrapolation the actual coupling constant. C is found to be almost constant and equal to 0.84 ± 0.02 for frequency differences between the two eigenmodes ranging from 45 GHz up to 1.35 THz.

Domaines: Sciences de l'ingénieur [physics]

Gaëlle Brévalle, Salvatore Pes, Cyril Paranthoen, Mathieu Perrin, Christophe Levallois, et al.. Direct measurement of the spectral dependence of Lamb coupling constant in a dual frequency quantum well-based VECSEL. Optics Express, 2019, 27 (15), pp.21083-21091. ⟨10.1364/OE.27.021083⟩. ⟨hal-02290437⟩