  Spatial light modulator (SLM) controlled transmission of light through opaque
media is a relatively new experimental method with wide applications in various
fields. While there has been a surge in research into the technique, there has
been little work reported considering the effects of various experimental
parameters on the efficiency of optimization. In this study, we explore the
effects of various experimental conditions on optimization and find that the
intensity enhancement depends on the number of modulated channels, number of
phase steps, feedback integration radius, beam spot size, and active SLM area.
We also develop a model, based on the propagation of a Gaussian beam with a
random phase front, to account for most of the measured effects.
