203 - Fiber optic atomic force microscope (FOAFM) with feedback.

Fiber optic atomic force microscope (FOAFM) uses fiber optic interferometer Fabry-Perot to interrogate cantilever displacements. The use of piezoceramic feedback allows the better linearity and the wider dynamic range to be achieved. In this case the optical fiber and needle moves together up and down tracking the profile of the surface.