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.
© 2006 Optical Society of America
Lasers and Laser Optics
Original Manuscript: August 10, 2005
Revised Manuscript: November 24, 2005
Manuscript Accepted: December 7, 2005
Jon Paul, Cristina Masoller, Yanhua Hong, Paul S. Spencer, and K. Alan Shore, "Experimental study of polarization switching of vertical-cavity surface-emitting lasers as a dynamical bifurcation," Opt. Lett. 31, 748-750 (2006)