The European Physical Journal Applied Physics

Table of Contents - July 2009 - Volume 47, Issue 01 (4th Colloquium Interdisciplinary in Instrumentation (C2I 2007))  

Instrumentation and Metrology

Generation of local magnetic field; application to VCSEL

O. Gaiffea1, S. Euphrasiea1, B. Cretina1 and P. Vairaca1

Institut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, UTBM, 32 av. de l'Observatoire, 25044 Besançon Cedex, France

Abstract

In this article, we report on the simulation and realization of a magnetic circuit allowing to apply an axial magnetic field higher than 1 T. The proposed electromagnet is used to investigate the influence of a magnetic field on the polarization behavior of a vertical-cavity-surface-emitting laser (VCSEL). A non-linear polarization behavior can be experimentally observed for currents as low as the threshold current, provided that the magnetic field is strong enough.

(Received August 1 2008)

(Accepted March 5 2009)

(Online publication April 22 2009)

PACS:

  • 41.20.Gz – Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems;
  • 42.55.Px – Semiconductor lasers; laser diodes;
  • 42.25.Ja – Polarization

pascal.vairac@femto-st.fr