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Proceedings Paper

Linewidth evaluation of gain-guided VCSELs
Author(s): Pierluigi De Bernardis; Gian Paolo Bava; Laura Fratta
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Paper Abstract

An electromagnetic model of Vertical Cavity Surface Emitting Lasers based on semiconductor compounds is developed to study the threshold conditions, the mode field distributions and the noise properties, in particular the linewidth. The model relies on the solution of Maxwell equations by using an expansion in plane waves. The main purpose is the description of the optical field confinement due to the gain mechanism induced by carrier injection. This strongly influences the noise properties and gives rise, in the case of a waveguide device, to the Petermann factor. The solution of the problem is based on an integral equation of the Fredholm type whose eigenvalues are related to the threshold operating conditions and whose eigenvectors give the field distributions. The noise characteristics are analyzed by introducing a Langevin source term in the integral equation.

Paper Details

Date Published: 29 April 1999
PDF: 10 pages
Proc. SPIE 3627, Vertical-Cavity Surface-Emitting Lasers III, (29 April 1999); doi: 10.1117/12.347108
Show Author Affiliations
Pierluigi De Bernardis, CESPA (Italy)
Gian Paolo Bava, Politecnico di Torino (Italy)
Laura Fratta, Politecnico di Torino (Italy)


Published in SPIE Proceedings Vol. 3627:
Vertical-Cavity Surface-Emitting Lasers III
Kent D. Choquette; Chun Lei, Editor(s)

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