Title :
A Vertical-Cavity Surface-Emitting Laser at Threshold
Author :
Fordell, Thomas ; Toffano, Zeno ; Lindberg, Åsa Marie
Author_Institution :
Accelerator Lab., Helsinki Univ.
Abstract :
Linewidth is measured over the threshold transition of a vertical-cavity surface-emitting laser and results are compared to a Fokker-Planck semiconductor laser model. The linewidth shows nonmonotonous behavior at threshold similar to that previously observed in distributed feedback lasers. The behavior agrees with the Fokker-Planck model if the linewidth enhancement factor alphaap5.0. Measurement of the relaxation oscillation frequency and the damping rate using an injected optical probe allows, together with the Fokker-Planck model, the extraction of major laser parameters
Keywords :
laser transitions; semiconductor lasers; spectral line breadth; surface emitting lasers; Fokker-Planck semiconductor laser model; distributed feedback lasers; linewidth enhancement factor; relaxation oscillation frequency; vertical-cavity surface-emitting laser; Damping; Distributed feedback devices; Frequency measurement; Laser feedback; Laser modes; Laser transitions; Optical feedback; Semiconductor lasers; Surface emitting lasers; Vertical cavity surface emitting lasers; Optical spectroscopy; quantum-well lasers; semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.884882
