An approach is described for the recovery of images from tightly confined spaces by use of multimode fibers, and an analytical demonstration shows that the concept is sound. The proof of concept draws on earlier studies that concentrated on image recovery after two-way and one-way transmissions through a multimode fiber; both types of transmission used four-wave-mixing techniques. The approach described also uses four-wave mixing but utilizes two fibers to capture the image at some intermediate point that is accessible to the fibers but that is visually inaccessible to the casual viewer.
© 1999 Optical Society of America
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(190.5040) Nonlinear optics : Phase conjugation
D. J. Jackson, "Technique for recovering images from tightly confined spaces," J. Opt. Soc. Am. A 16, 1072-1075 (1999)