We demonstrate the application of a subpicosecond optical parametric amplifier working at degeneracy to imaging in diffuse media. This optical parametric amplifier exhibits small-signal gains greater than 104, thereby acting as a high-gain ultrafast amplifying gate. We have used it to construct the image of a grid pattern hidden behind 20 mean free paths of a highly diffusing solution of latex microspheres with a spatial resolution of 200 µm.
© 1995 Optical Society of America
Jennifer Watson, Patrick Georges, Thierry Lépine, Bruno Alonzi, and Alain Brun, "Imaging in diffuse media with ultrafast degenerate optical parametric amplification," Opt. Lett. 20, 231-233 (1995)