Experimental study of polarization switching of vertical-cavity surface-emitting lasers as a dynamical bifurcation.
We study the role of the bias current sweep rate in measurements of polarization switching (PS) of vertical-cavity surface-emitting lasers (VCSELs). We show that the polarization-resolved L-I (light-intensity) curve depends on the current sweep rate. As the current sweep rate increases, the PS occurs at higher bias currents for upward scans and at lower bias currents for downward scans. We also show that the delay of the dynamical bifurcation follows a power law relationship with the frequency of the ramp, in good agreement with recent theoretical predictions.
School of Informatics, University of Wales, Bangor, Dean Street, Bangor LL57 1 UT, Wales, UK. jpaul@informatics.bangor.ac.uk
Jon
J
Paul
Cristina
C
Masoller
Yanhua
Y
Hong
Paul S
PS
Spencer
K Alan
KA
Shore