Abstract
We present an experimental study of the spatial coherence properties of Broad-Area Vertical-Cavity Surface-Emitting Lasers (BA-VCSELs). In particular we demonstrate that the spatially incoherent emission regime [1] that can be invoked in pulsed operation stems from two different thermal effects: thermal lens and thermal chirp. We have separately measured the influence of these effects on the appearance of the spatially incoherent emission by pre-installing a thermal lens through a current bias and subsequently modulating a pulse onto the bias. By means of a differential method we are able to analyze the emission character during the additional current pulse alone.
© 2009 IEEE
PDF ArticleMore Like This
T. Ackemann, J.R. Tredicce, R. Jäger, and K.J. Ebeling
QThI3 Quantum Electronics and Laser Science Conference (CLEO:FS) 1999
Falko Riechert, Uli Lemmer, Michael Peeters, Ingo Fischer, Guy Verschaffelt, and Georg Bastian
CB5_3 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2007
Guy Verschaffelt, Michael Peeters, Ingo Fischer, Shyam K. Mandrer, and Wolfgang Elsäßer
CB5_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2007