Achieving Variable Phase Shift in Yellow Light

AI Thread Summary
To achieve a variable phase shift in yellow light at 580 nanometers, a technique involving voltage modulation of a phase shift device is being explored. The desired modulation frequency is around ten megahertz, with a minimum phase shift of two wavelengths. Suggestions include using a phase plate to facilitate this shift. The discussion highlights challenges faced in earlier attempts, emphasizing the need for precision in measurements. Overall, the focus remains on identifying effective systems or methods for achieving the specified phase shift.
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I would like to cause a phase shift in light. I would prefer to do
so by varying the voltage to the phase shift device. Is there any existing
system or any suggestions?

We had a bit of difficulty with this one. I dropped a few decimal points or something.

Lets try this one more time. I am looking for a technique to cause a variable phase shift or delay in a yellow (580 nanometer) light beam. The modulation frequency is in the order of ten megahertz, the shift need only be a minimum of two wavelengths of the yellow light.
 
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