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  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper CThH5

Two-mode Emission and Polarization Dynamics at Lasing Threshold in a Vertical-cavity Surface-emitting Laser

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Abstract

VCSELs are well known to show polarization instabilities or polarization switching (PS) if the current is changed l,2 as well as fluctuations of their state of polarization at fixed current.3 Nevertheless, in most devices only one of two possible orthogonal linear polarized fundamental transverse modes, which are frequency split by birefringence ( e.g.1 ), is emitted at the threshold to laser emission. In this contribution we present the results of experimental investigations on the situation when both of the fundamental transverse modes are excited at threshold. This phenomenon has been observed by different authors in the past.4,5,6 however, there are no detailed investigations available.

© 2002 Optical Society of America

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