Issue Eur. Phys. J. Appl. Phys. Volume 47, Number 1, July 2009 4th Colloquium Interdisciplinary in Instrumentation (C2I) Article Number 11201 Number of page(s) 5 Section Instrumentation and Metrology DOI 10.1051/epjap/2009066 Published online 22 April 2009

Eur. Phys. J. Appl. Phys. 47, 11201 (2009)
DOI: 10.1051/epjap/2009066

Generation of local magnetic field; application to VCSEL

O. Gaiffe, S. Euphrasie, B. Cretin and P. Vairac

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

pascal.vairac@femto-st.fr

Received: 1st August 2008 / Accepted: 5 March 2009 / Published online: 22 April 2009

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.

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

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