Piezo Driver
We scan the position of one of the mirrors of the interferometer by putting a piezo-electric stack (Thorlabs AE0505D08 - $129) as an insert in a translation stage. It works better than mounting the mirror on the piezo, because the piezo moves slightly in two dimensions, introducing a misalignment as it is scanned. The piezo goes over about 30 fringes (at 533 nm) for a voltage scan of 140 V. The early part of the scan is not linear with voltage.
In the past we have used as drivers either a high-voltage source or a high-voltage amplifier driven by a low voltage source. Both are expensive alternatives. Recently we found an inexpensive miniature high-voltage amplifier (EMCO model Q02-24, $78). It outputs 0-200V for inputs of 0-24 V. It involves very simple wiring and does not involve using any supply other than the input source.