Methods for the stabilization of interferometric systems and interferometric systems implementing such methods

A method for stabilization of an interferometric system, wherein said interferometric system comprises:

• a light source for emitting an initial beam of coherent light;
• a spatial light modulator configured to receive at least a first part of said initial beam and input data, and configured to emit a spatially modulated beam resulting from a spatial modulation of a parameter of said first part of said initial beam based on said input data;
• a scattering medium configured to receive said spatially modulated beam;
• a detection unit configured to
• acquire an interference pattern in a first detection plane at an output of said scattering medium, wherein said interference pattern results from the interferences between randomly scattered optical paths taken by the spatially modulated beam through the scattering medium;
• wherein the method comprises:
• acquiring, using said detection unit, a reference interference pattern in said detection plane, wherein said interference pattern results from the interferences between randomly scattered optical paths taken by a reference beam through the scattering medium;
• varying the frequency of the light source as a function of a change in said reference interference pattern in order to at least partially compensate a change in said interference pattern resulting from a change in at least one environmental parameter;
• wherein varying the frequency of the light source comprises
• calculating a measurement of similarity between two interference patterns corresponding to said reference interference pattern acquired at two different times;
• and
• determining a variation of the light source frequency to apply to the light source based on said measurement of similarity.