Polarization correlations in pulsed,
vertical-cavity, surface-emitting lasers
D.R. Shelly, T.W.S. Garrison, M. Beck and D.H. Christensen,
Express, 7, 249-259 (2000).
We have examined the noise behavior and polarization correlations in the output of a pulsed, multitransverse-mode, vertical-cavity, surface-emitting laser (VCSEL). We have measured the output of the laser simultaneously in two orthogonal, linear polarizations as a function of drive current for pulse widths of 3 ns, 10 ns, and 30 ns. We present joint probability distributions for the number of detected photoelectrons in each of the two polarization-resolved outputs. The joint distributions indicate that the correlations can be quite complicated, and are not completely described by a single number (i.e., the correlation coefficient). Furthermore, we find that the number of lasing modes appears to be the most important parameter in determining the degree of polarization correlation.