ONE-SHOT INTERFEROMETER WITH SIMULTANEOUS RECORDING OF THE SIGNAL INTENSITY

摘要

With interferometry it is only possible to determine the phase difference ΔΦ between two coherent waves S (signal) and R (reference) directly from the interferogram IF if the intensities of the waves are known. In some cases (dynamic processes) the signal intensity is not known. A system is presented that measures the intensity distribution of S and IF simultaneously on different parts of a camera detector with one shot.All elements of this system are combined in a compact module that can be mounted on a standard camera. So, all information to determine the phase difference is acquired within one shot (with a known reference wave).An example is shown for measuring the wave front of a phase-conjugated signal generated in a photorefractive Bi_(12)TiO_(20) crystal.