Techniques are provided for prioritizing a choice. An optical limiter such as a two photon absorber can be used in conjunction with the R-FPSA, so that Q-switching is inhibited, resulting in laser output that is cw modelocked. The present invention further relates to uses of the cesium salt as well as methods of making cesium hydroxide using lime. The method and system can process media data such as video, audio, text, or other media data. Whereby a drive circuit for the insulated gate device can be reduced loss at the time of turn-on and reduced temperature dependency of noise. The second reflecting surface can reflect the light from the light-emitting element toward the phosphor.