Random transverse tomography and phase-conjugate scanning for image acquisition through a multimode fiber

A monochromatic optical field carrying an image is known to be scrambled due to propagation through a multimode fiber. Two schemes of the image acquisition through such a fiber are suggested. Both are based on the assumption that the input-to-output propagation Green function is stabilized by some technique. In both schemes the object is characterized by the transverse distribution of reflection pattern, and the reflected signal is to be collected by a photodetector for further computer processing. The applications for endoscopy are discussed. (C) 1996 Society of Photo-Optical Instrumentation Engineers.