Perhaps this will work, it is a prototype of a polarization switch using a phase modulator based optical switch. The initial laser is polarized at 45 degrees. The top polarizer is 0 degrees and the bottom polarizer is 90 degrees. The outputs are then combined. If you look at the final Optical Time Domain Visualizer, you will see constant total power output but the X-Power and Y-Power are now modulated according to the input sequence generator.